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