diff --git a/examples/csharp/Helloworld/Greeter/Greeter.csproj b/examples/csharp/Helloworld/Greeter/Greeter.csproj
index 7989f795418..223b7fe1242 100644
--- a/examples/csharp/Helloworld/Greeter/Greeter.csproj
+++ b/examples/csharp/Helloworld/Greeter/Greeter.csproj
@@ -5,9 +5,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.6.1" />
-    <PackageReference Include="Grpc" Version="1.17.0" />
-    <PackageReference Include="Grpc.Tools" Version="1.17.0" PrivateAssets="All" />
+    <PackageReference Include="Google.Protobuf" Version="3.8.0" />
+    <PackageReference Include="Grpc" Version="2.23.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.23.0" PrivateAssets="All" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/examples/csharp/HelloworldLegacyCsproj/Greeter/Greeter.csproj b/examples/csharp/HelloworldLegacyCsproj/Greeter/Greeter.csproj
index da15ba3954b..adb2c7ac2c9 100644
--- a/examples/csharp/HelloworldLegacyCsproj/Greeter/Greeter.csproj
+++ b/examples/csharp/HelloworldLegacyCsproj/Greeter/Greeter.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.props" Condition="Exists('..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.props')" />
   <PropertyGroup>
@@ -33,18 +33,26 @@
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.6.1.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <HintPath>..\packages\Google.Protobuf.3.6.1\lib\net45\Google.Protobuf.dll</HintPath>
+    <Reference Include="Google.Protobuf, Version=3.8.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
+      <HintPath>..\packages\Google.Protobuf.3.8.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
-    <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
-      <HintPath>..\packages\Grpc.Core.1.17.0\lib\net45\Grpc.Core.dll</HintPath>
+    <Reference Include="Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.2.23.0\lib\net45\Grpc.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core.Api, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.Api.2.23.0\lib\net45\Grpc.Core.Api.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Interactive.Async, Version=3.0.1000.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263, processorArchitecture=MSIL">
-      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard1.1\System.Buffers.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.3\lib\netstandard1.1\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.2\lib\netstandard1.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -57,14 +65,14 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup />
-  <Import Project="..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets'))" />
     <Error Condition="!Exists('..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.props'))" />
     <Error Condition="!Exists('..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets'))" />
   </Target>
   <Import Project="..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.targets" Condition="Exists('..\packages\Grpc.Tools.1.17.0\build\Grpc.Tools.targets')" />
-</Project>
+  <Import Project="..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" />
+</Project>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldLegacyCsproj/Greeter/packages.config b/examples/csharp/HelloworldLegacyCsproj/Greeter/packages.config
index 154b5993213..418bfaba736 100644
--- a/examples/csharp/HelloworldLegacyCsproj/Greeter/packages.config
+++ b/examples/csharp/HelloworldLegacyCsproj/Greeter/packages.config
@@ -1,8 +1,11 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net45" />
-  <package id="Grpc" version="1.17.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="1.17.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.8.0" targetFramework="net45" />
+  <package id="Grpc" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core.Api" version="2.23.0" targetFramework="net45" />
   <package id="Grpc.Tools" version="1.17.0" targetFramework="net45" developmentDependency="true" />
-  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
-</packages>
+  <package id="System.Buffers" version="4.4.0" targetFramework="net45" />
+  <package id="System.Memory" version="4.5.3" targetFramework="net45" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="net45" />
+</packages>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldLegacyCsproj/GreeterClient/GreeterClient.csproj b/examples/csharp/HelloworldLegacyCsproj/GreeterClient/GreeterClient.csproj
index 31a3a90345b..ec860440cfb 100644
--- a/examples/csharp/HelloworldLegacyCsproj/GreeterClient/GreeterClient.csproj
+++ b/examples/csharp/HelloworldLegacyCsproj/GreeterClient/GreeterClient.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -32,18 +32,26 @@
     <Externalconsole>true</Externalconsole>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.6.1.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <HintPath>..\packages\Google.Protobuf.3.6.1\lib\net45\Google.Protobuf.dll</HintPath>
+    <Reference Include="Google.Protobuf, Version=3.8.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
+      <HintPath>..\packages\Google.Protobuf.3.8.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
-    <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
-      <HintPath>..\packages\Grpc.Core.1.17.0\lib\net45\Grpc.Core.dll</HintPath>
+    <Reference Include="Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.2.23.0\lib\net45\Grpc.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core.Api, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.Api.2.23.0\lib\net45\Grpc.Core.Api.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Interactive.Async, Version=3.0.1000.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263, processorArchitecture=MSIL">
-      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard1.1\System.Buffers.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.3\lib\netstandard1.1\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.2\lib\netstandard1.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
@@ -59,11 +67,11 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets'))" />
   </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldLegacyCsproj/GreeterClient/packages.config b/examples/csharp/HelloworldLegacyCsproj/GreeterClient/packages.config
index 2fd8228689d..1f648dd06b8 100644
--- a/examples/csharp/HelloworldLegacyCsproj/GreeterClient/packages.config
+++ b/examples/csharp/HelloworldLegacyCsproj/GreeterClient/packages.config
@@ -1,7 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net45" />
-  <package id="Grpc" version="1.17.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="1.17.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.8.0" targetFramework="net45" />
+  <package id="Grpc" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core.Api" version="2.23.0" targetFramework="net45" />
+  <package id="System.Buffers" version="4.4.0" targetFramework="net45" />
+  <package id="System.Memory" version="4.5.3" targetFramework="net45" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldLegacyCsproj/GreeterServer/GreeterServer.csproj b/examples/csharp/HelloworldLegacyCsproj/GreeterServer/GreeterServer.csproj
index 27ca9630401..e4685a6fc07 100644
--- a/examples/csharp/HelloworldLegacyCsproj/GreeterServer/GreeterServer.csproj
+++ b/examples/csharp/HelloworldLegacyCsproj/GreeterServer/GreeterServer.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -32,18 +32,26 @@
     <Externalconsole>true</Externalconsole>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.6.1.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <HintPath>..\packages\Google.Protobuf.3.6.1\lib\net45\Google.Protobuf.dll</HintPath>
+    <Reference Include="Google.Protobuf, Version=3.8.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
+      <HintPath>..\packages\Google.Protobuf.3.8.0\lib\net45\Google.Protobuf.dll</HintPath>
     </Reference>
-    <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
-      <HintPath>..\packages\Grpc.Core.1.17.0\lib\net45\Grpc.Core.dll</HintPath>
+    <Reference Include="Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.2.23.0\lib\net45\Grpc.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core.Api, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.Api.2.23.0\lib\net45\Grpc.Core.Api.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Interactive.Async, Version=3.0.1000.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263, processorArchitecture=MSIL">
-      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard1.1\System.Buffers.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.3\lib\netstandard1.1\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.2\lib\netstandard1.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
@@ -59,11 +67,11 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.1.17.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.2.23.0\build\net45\Grpc.Core.targets'))" />
   </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldLegacyCsproj/GreeterServer/packages.config b/examples/csharp/HelloworldLegacyCsproj/GreeterServer/packages.config
index 2fd8228689d..1f648dd06b8 100644
--- a/examples/csharp/HelloworldLegacyCsproj/GreeterServer/packages.config
+++ b/examples/csharp/HelloworldLegacyCsproj/GreeterServer/packages.config
@@ -1,7 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net45" />
-  <package id="Grpc" version="1.17.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="1.17.0" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.8.0" targetFramework="net45" />
+  <package id="Grpc" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="2.23.0" targetFramework="net45" />
+  <package id="Grpc.Core.Api" version="2.23.0" targetFramework="net45" />
+  <package id="System.Buffers" version="4.4.0" targetFramework="net45" />
+  <package id="System.Memory" version="4.5.3" targetFramework="net45" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldXamarin/Droid/HelloworldXamarin.Droid.csproj b/examples/csharp/HelloworldXamarin/Droid/HelloworldXamarin.Droid.csproj
index 991fa0c9bcc..a25dfdf92d0 100644
--- a/examples/csharp/HelloworldXamarin/Droid/HelloworldXamarin.Droid.csproj
+++ b/examples/csharp/HelloworldXamarin/Droid/HelloworldXamarin.Droid.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -15,7 +15,8 @@
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
-    <AndroidUseLatestPlatformSdk>true</AndroidUseLatestPlatformSdk>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -38,7 +39,25 @@
     <AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Google.Protobuf, Version=3.8.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
+      <HintPath>..\packages\Google.Protobuf.3.8.0\lib\netstandard2.0\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.2.23.0\lib\netstandard2.0\Grpc.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core.Api, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.Api.2.23.0\lib\netstandard2.0\Grpc.Core.Api.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard2.0\System.Buffers.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.3\lib\netstandard2.0\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.2\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Xml" />
     <Reference Include="System.Core" />
     <Reference Include="Mono.Android" />
@@ -50,12 +69,6 @@
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\netstandard1.3\System.Interactive.Async.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.6.0\lib\netstandard1.0\Google.Protobuf.dll</HintPath>
-    </Reference>
-    <Reference Include="Grpc.Core">
-      <HintPath>..\packages\Grpc.Core.1.18.0\lib\netstandard1.5\Grpc.Core.dll</HintPath>
-    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="MainActivity.cs" />
@@ -63,6 +76,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="app.config" />
     <None Include="Resources\AboutResources.txt" />
     <None Include="Properties\AndroidManifest.xml" />
     <None Include="Assets\AboutAssets.txt" />
@@ -79,5 +93,11 @@
   </ItemGroup>
   <Import Project="..\HelloworldXamarin\HelloworldXamarin.projitems" Label="Shared" Condition="Exists('..\HelloworldXamarin\HelloworldXamarin.projitems')" />
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
-  <Import Project="..\packages\Grpc.Core.1.18.0\build\MonoAndroid10\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.1.18.0\build\MonoAndroid10\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.2.23.0\build\MonoAndroid10\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\MonoAndroid10\Grpc.Core.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Grpc.Core.2.23.0\build\MonoAndroid10\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.2.23.0\build\MonoAndroid10\Grpc.Core.targets'))" />
+  </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldXamarin/Droid/Properties/AndroidManifest.xml b/examples/csharp/HelloworldXamarin/Droid/Properties/AndroidManifest.xml
index 4f2167a1a03..9d767ff323d 100644
--- a/examples/csharp/HelloworldXamarin/Droid/Properties/AndroidManifest.xml
+++ b/examples/csharp/HelloworldXamarin/Droid/Properties/AndroidManifest.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="io.grpc.examples.HelloworldXamarin">
-    <uses-sdk android:minSdkVersion="15" />
-    <application android:label="HelloworldXamarin">
-    </application>
-</manifest>
+	<uses-sdk android:minSdkVersion="15" android:targetSdkVersion="27" />
+	<application android:label="HelloworldXamarin"></application>
+</manifest>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldXamarin/Droid/packages.config b/examples/csharp/HelloworldXamarin/Droid/packages.config
index 29201117298..d56f8b7d22e 100644
--- a/examples/csharp/HelloworldXamarin/Droid/packages.config
+++ b/examples/csharp/HelloworldXamarin/Droid/packages.config
@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.0" targetFramework="monoandroid81" />
-  <package id="Grpc.Core" version="1.18.0" targetFramework="monoandroid81" />
+  <package id="Google.Protobuf" version="3.8.0" targetFramework="monoandroid81" />
+  <package id="Grpc.Core" version="2.23.0" targetFramework="monoandroid81" />
+  <package id="Grpc.Core.Api" version="2.23.0" targetFramework="monoandroid81" />
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="monoandroid81" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="monoandroid81" />
   <package id="NETStandard.Library" version="1.6.1" targetFramework="monoandroid81" />
   <package id="System.AppContext" version="4.3.0" targetFramework="monoandroid81" />
+  <package id="System.Buffers" version="4.4.0" targetFramework="monoandroid81" />
   <package id="System.Collections" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Console" version="4.3.0" targetFramework="monoandroid81" />
@@ -22,6 +24,7 @@
   <package id="System.IO.FileSystem.Primitives" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Linq" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Linq.Expressions" version="4.3.0" targetFramework="monoandroid81" />
+  <package id="System.Memory" version="4.5.3" targetFramework="monoandroid81" />
   <package id="System.Net.Http" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Net.Primitives" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Net.Sockets" version="4.3.0" targetFramework="monoandroid81" />
@@ -31,6 +34,7 @@
   <package id="System.Reflection.Primitives" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Resources.ResourceManager" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Runtime" version="4.3.0" targetFramework="monoandroid81" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="monoandroid81" />
   <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Runtime.Handles" version="4.3.0" targetFramework="monoandroid81" />
   <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="monoandroid81" />
diff --git a/examples/csharp/HelloworldXamarin/HelloworldXamarin.sln b/examples/csharp/HelloworldXamarin/HelloworldXamarin.sln
index e2a738f157e..ee3ea5c95d6 100644
--- a/examples/csharp/HelloworldXamarin/HelloworldXamarin.sln
+++ b/examples/csharp/HelloworldXamarin/HelloworldXamarin.sln
@@ -1,6 +1,7 @@
-
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2012
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.329
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "HelloworldXamarin", "HelloworldXamarin\HelloworldXamarin.shproj", "{42FFF3D8-934F-4475-8E68-08DA340BF6E8}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HelloworldXamarin.Droid", "Droid\HelloworldXamarin.Droid.csproj", "{B9B0D41C-1C07-4590-A919-5865E741B2EA}"
@@ -8,38 +9,49 @@ EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HelloworldXamarin.iOS", "iOS\HelloworldXamarin.iOS.csproj", "{62336DF0-60D8-478F-8140-B3CB089B417E}"
 EndProject
 Global
+	GlobalSection(SharedMSBuildProjectFiles) = preSolution
+		HelloworldXamarin\HelloworldXamarin.projitems*{42fff3d8-934f-4475-8e68-08da340bf6e8}*SharedItemsImports = 13
+		HelloworldXamarin\HelloworldXamarin.projitems*{62336df0-60d8-478f-8140-b3cb089b417e}*SharedItemsImports = 4
+		HelloworldXamarin\HelloworldXamarin.projitems*{b9b0d41c-1c07-4590-a919-5865e741b2ea}*SharedItemsImports = 4
+	EndGlobalSection
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
+		Debug|iPhone = Debug|iPhone
 		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|Any CPU = Release|Any CPU
 		Release|iPhone = Release|iPhone
 		Release|iPhoneSimulator = Release|iPhoneSimulator
-		Debug|iPhone = Debug|iPhone
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhone.Build.0 = Debug|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|iPhone.ActiveCfg = Release|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|iPhone.Build.0 = Release|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
 		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
-		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhone.ActiveCfg = Debug|Any CPU
-		{B9B0D41C-1C07-4590-A919-5865E741B2EA}.Debug|iPhone.Build.0 = Debug|Any CPU
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|Any CPU.ActiveCfg = Debug|iPhoneSimulator
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|Any CPU.Build.0 = Debug|iPhoneSimulator
-		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|Any CPU.ActiveCfg = Release|iPhone
-		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|Any CPU.Build.0 = Release|iPhone
+		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhone.ActiveCfg = Debug|iPhone
+		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhone.Build.0 = Debug|iPhone
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|Any CPU.ActiveCfg = Release|iPhone
+		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|Any CPU.Build.0 = Release|iPhone
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|iPhone.ActiveCfg = Release|iPhone
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|iPhone.Build.0 = Release|iPhone
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
 		{62336DF0-60D8-478F-8140-B3CB089B417E}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
-		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhone.ActiveCfg = Debug|iPhone
-		{62336DF0-60D8-478F-8140-B3CB089B417E}.Debug|iPhone.Build.0 = Debug|iPhone
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {CDC6F6DC-E1C6-45A7-ACC2-A61CDCCA1436}
 	EndGlobalSection
 EndGlobal
diff --git a/examples/csharp/HelloworldXamarin/iOS/HelloworldXamarin.iOS.csproj b/examples/csharp/HelloworldXamarin/iOS/HelloworldXamarin.iOS.csproj
index 9154bf33527..844e06c24c6 100644
--- a/examples/csharp/HelloworldXamarin/iOS/HelloworldXamarin.iOS.csproj
+++ b/examples/csharp/HelloworldXamarin/iOS/HelloworldXamarin.iOS.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -9,6 +9,8 @@
     <RootNamespace>HelloworldXamarin.iOS</RootNamespace>
     <AssemblyName>HelloworldXamarin.iOS</AssemblyName>
     <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
     <DebugSymbols>true</DebugSymbols>
@@ -77,7 +79,25 @@
     <PlatformTarget>x86</PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Google.Protobuf, Version=3.8.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
+      <HintPath>..\packages\Google.Protobuf.3.8.0\lib\netstandard2.0\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.2.23.0\lib\netstandard2.0\Grpc.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Grpc.Core.Api, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
+      <HintPath>..\packages\Grpc.Core.Api.2.23.0\lib\netstandard2.0\Grpc.Core.Api.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard2.0\System.Buffers.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Memory.4.5.3\lib\netstandard2.0\System.Memory.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.4.5.2\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Xml" />
     <Reference Include="System.Core" />
     <Reference Include="Xamarin.iOS" />
@@ -89,16 +109,14 @@
     <Reference Include="System.Interactive.Async">
       <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\netstandard1.3\System.Interactive.Async.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.6.0\lib\netstandard1.0\Google.Protobuf.dll</HintPath>
-    </Reference>
-    <Reference Include="Grpc.Core">
-      <HintPath>..\packages\Grpc.Core.1.18.0\lib\netstandard1.5\Grpc.Core.dll</HintPath>
-    </Reference>
   </ItemGroup>
   <ItemGroup>
-    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json" />
-    <ImageAsset Include="Assets.xcassets\Contents.json" />
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\Contents.json">
+      <Visible>false</Visible>
+    </ImageAsset>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Resources\" />
@@ -108,6 +126,7 @@
     <InterfaceDefinition Include="Main.storyboard" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="app.config" />
     <None Include="Info.plist" />
     <None Include="Entitlements.plist" />
     <None Include="packages.config" />
@@ -122,5 +141,11 @@
   </ItemGroup>
   <Import Project="..\HelloworldXamarin\HelloworldXamarin.projitems" Label="Shared" Condition="Exists('..\HelloworldXamarin\HelloworldXamarin.projitems')" />
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
-  <Import Project="..\packages\Grpc.Core.1.18.0\build\Xamarin.iOS10\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.1.18.0\build\Xamarin.iOS10\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.2.23.0\build\Xamarin.iOS10\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.2.23.0\build\Xamarin.iOS10\Grpc.Core.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Grpc.Core.2.23.0\build\Xamarin.iOS10\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.2.23.0\build\Xamarin.iOS10\Grpc.Core.targets'))" />
+  </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/HelloworldXamarin/iOS/packages.config b/examples/csharp/HelloworldXamarin/iOS/packages.config
index 055222ba48f..80802a8d124 100644
--- a/examples/csharp/HelloworldXamarin/iOS/packages.config
+++ b/examples/csharp/HelloworldXamarin/iOS/packages.config
@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.6.0" targetFramework="xamarinios10" />
-  <package id="Grpc.Core" version="1.18.0" targetFramework="xamarinios10" />
+  <package id="Google.Protobuf" version="3.8.0" targetFramework="xamarinios10" />
+  <package id="Grpc.Core" version="2.23.0" targetFramework="xamarinios10" />
+  <package id="Grpc.Core.Api" version="2.23.0" targetFramework="xamarinios10" />
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="xamarinios10" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="xamarinios10" />
   <package id="NETStandard.Library" version="1.6.1" targetFramework="xamarinios10" />
   <package id="System.AppContext" version="4.3.0" targetFramework="xamarinios10" />
+  <package id="System.Buffers" version="4.4.0" targetFramework="xamarinios10" />
   <package id="System.Collections" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Console" version="4.3.0" targetFramework="xamarinios10" />
@@ -22,6 +24,7 @@
   <package id="System.IO.FileSystem.Primitives" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Linq" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Linq.Expressions" version="4.3.0" targetFramework="xamarinios10" />
+  <package id="System.Memory" version="4.5.3" targetFramework="xamarinios10" />
   <package id="System.Net.Http" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Net.Primitives" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Net.Sockets" version="4.3.0" targetFramework="xamarinios10" />
@@ -31,6 +34,7 @@
   <package id="System.Reflection.Primitives" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Resources.ResourceManager" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Runtime" version="4.3.0" targetFramework="xamarinios10" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="xamarinios10" />
   <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Runtime.Handles" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Runtime.InteropServices" version="4.3.0" targetFramework="xamarinios10" />
diff --git a/examples/csharp/RouteGuide/RouteGuide/RouteGuide.csproj b/examples/csharp/RouteGuide/RouteGuide/RouteGuide.csproj
index 4c6949488c7..bd374a887c1 100644
--- a/examples/csharp/RouteGuide/RouteGuide/RouteGuide.csproj
+++ b/examples/csharp/RouteGuide/RouteGuide/RouteGuide.csproj
@@ -5,9 +5,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.6.1" />
-    <PackageReference Include="Grpc" Version="1.17.0" />
-    <PackageReference Include="Grpc.Tools" Version="1.17.0" PrivateAssets="All" />
+    <PackageReference Include="Google.Protobuf" Version="3.8.0" />
+    <PackageReference Include="Grpc" Version="2.23.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.23.0" PrivateAssets="All" />
     <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
   </ItemGroup>
 
diff --git a/src/csharp/Grpc.Core/Interceptors/ChannelExtensions.cs b/src/csharp/Grpc.Core.Api/Interceptors/ChannelExtensions.cs
similarity index 87%
rename from src/csharp/Grpc.Core/Interceptors/ChannelExtensions.cs
rename to src/csharp/Grpc.Core.Api/Interceptors/ChannelExtensions.cs
index c7d0c2472a1..fe3b516857e 100644
--- a/src/csharp/Grpc.Core/Interceptors/ChannelExtensions.cs
+++ b/src/csharp/Grpc.Core.Api/Interceptors/ChannelExtensions.cs
@@ -38,9 +38,9 @@ namespace Grpc.Core.Interceptors
         /// building a chain like "channel.Intercept(c).Intercept(b).Intercept(a)".  Note that
         /// in this case, the last interceptor added will be the first to take control.
         /// </remarks>
-        public static CallInvoker Intercept(this Channel channel, Interceptor interceptor)
+        public static CallInvoker Intercept(this ChannelBase channel, Interceptor interceptor)
         {
-            return new DefaultCallInvoker(channel).Intercept(interceptor);
+            return channel.CreateCallInvoker().Intercept(interceptor);
         }
 
         /// <summary>
@@ -59,9 +59,9 @@ namespace Grpc.Core.Interceptors
         /// building a chain like "channel.Intercept(c).Intercept(b).Intercept(a)".  Note that
         /// in this case, the last interceptor added will be the first to take control.
         /// </remarks>
-        public static CallInvoker Intercept(this Channel channel, params Interceptor[] interceptors)
+        public static CallInvoker Intercept(this ChannelBase channel, params Interceptor[] interceptors)
         {
-            return new DefaultCallInvoker(channel).Intercept(interceptors);
+            return channel.CreateCallInvoker().Intercept(interceptors);
         }
 
         /// <summary>
@@ -79,9 +79,9 @@ namespace Grpc.Core.Interceptors
         /// building a chain like "channel.Intercept(c).Intercept(b).Intercept(a)".  Note that
         /// in this case, the last interceptor added will be the first to take control.
         /// </remarks>
-        public static CallInvoker Intercept(this Channel channel, Func<Metadata, Metadata> interceptor)
+        public static CallInvoker Intercept(this ChannelBase channel, Func<Metadata, Metadata> interceptor)
         {
-            return new DefaultCallInvoker(channel).Intercept(interceptor);
+            return channel.CreateCallInvoker().Intercept(interceptor);
         }
     }
 }
diff --git a/src/csharp/Grpc.Core/ForwardedTypes.cs b/src/csharp/Grpc.Core/ForwardedTypes.cs
index 4394a7c907c..eaf974c3356 100644
--- a/src/csharp/Grpc.Core/ForwardedTypes.cs
+++ b/src/csharp/Grpc.Core/ForwardedTypes.cs
@@ -38,6 +38,7 @@ using Grpc.Core.Utils;
 [assembly:TypeForwardedToAttribute(typeof(CallInvoker))]
 [assembly:TypeForwardedToAttribute(typeof(CallInvokerExtensions))]
 [assembly:TypeForwardedToAttribute(typeof(CallOptions))]
+[assembly:TypeForwardedToAttribute(typeof(ChannelExtensions))]
 [assembly:TypeForwardedToAttribute(typeof(ClientBase))]
 [assembly:TypeForwardedToAttribute(typeof(ClientBase<>))]
 [assembly:TypeForwardedToAttribute(typeof(ChannelCredentials))]