diff --git a/src/csharp/Grpc.Core.NativeDebug/Grpc.Core.NativeDebug.csproj b/src/csharp/Grpc.Core.NativeDebug/Grpc.Core.NativeDebug.csproj
index be0bd1d2b10..f2b773816a7 100644
--- a/src/csharp/Grpc.Core.NativeDebug/Grpc.Core.NativeDebug.csproj
+++ b/src/csharp/Grpc.Core.NativeDebug/Grpc.Core.NativeDebug.csproj
@@ -19,19 +19,19 @@
 
   <ItemGroup>
     <None Include="..\nativelibs\csharp_ext_windows_x86\grpc_csharp_ext.dll">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x86.dll</PackagePath>
+      <PackagePath>runtimes/win-x86/native/grpc_csharp_ext.x86.dll</PackagePath>
       <Pack>true</Pack>
     </None>
     <None Include="..\nativelibs\csharp_ext_windows_x86\grpc_csharp_ext.pdb">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x86.pdb</PackagePath>
+      <PackagePath>runtimes/win-x86/native/grpc_csharp_ext.x86.pdb</PackagePath>
       <Pack>true</Pack>
     </None>
     <None Include="..\nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.dll">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x64.dll</PackagePath>
+      <PackagePath>runtimes/win-x64/native/grpc_csharp_ext.x64.dll</PackagePath>
       <Pack>true</Pack>
     </None>
     <None Include="..\nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.pdb">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x64.pdb</PackagePath>
+      <PackagePath>runtimes/win-x64/native/grpc_csharp_ext.x64.pdb</PackagePath>
       <Pack>true</Pack>
     </None>
   </ItemGroup>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 816f9ba68bf..b8f83bed429 100755
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -29,19 +29,19 @@
   <ItemGroup>
     <EmbeddedResource Include="..\..\..\etc\roots.pem" />
     <Content Include="..\nativelibs\csharp_ext_macos_x64\libgrpc_csharp_ext.dylib">
-      <PackagePath>runtimes/osx/native/libgrpc_csharp_ext.x64.dylib</PackagePath>
+      <PackagePath>runtimes/osx-x64/native/libgrpc_csharp_ext.x64.dylib</PackagePath>
       <Pack>true</Pack>
     </Content>
     <Content Include="..\nativelibs\csharp_ext_linux_x64\libgrpc_csharp_ext.so">
-      <PackagePath>runtimes/linux/native/libgrpc_csharp_ext.x64.so</PackagePath>
+      <PackagePath>runtimes/linux-x64/native/libgrpc_csharp_ext.x64.so</PackagePath>
       <Pack>true</Pack>
     </Content>
     <Content Include="..\nativelibs\csharp_ext_windows_x64\grpc_csharp_ext.dll">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x64.dll</PackagePath>
+      <PackagePath>runtimes/win-x64/native/grpc_csharp_ext.x64.dll</PackagePath>
       <Pack>true</Pack>
     </Content>
     <Content Include="..\nativelibs\csharp_ext_windows_x86\grpc_csharp_ext.dll">
-      <PackagePath>runtimes/win/native/grpc_csharp_ext.x86.dll</PackagePath>
+      <PackagePath>runtimes/win-x86/native/grpc_csharp_ext.x86.dll</PackagePath>
       <Pack>true</Pack>
     </Content>
     <Content Include="build\net45\Grpc.Core.targets">
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index a1bc15ec107..2a2bea363f9 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -95,7 +95,7 @@ namespace Grpc.Core.Internal
             // With dotnet cli project targeting netcoreappX.Y, projects will use Grpc.Core assembly directly in the location where it got restored
             // by nuget. We locate the native libraries based on known structure of Grpc.Core nuget package.
             // When "dotnet publish" is used, the runtimes directory is copied next to the published assemblies.
-            string runtimesDirectory = string.Format("runtimes/{0}/native", GetPlatformString());
+            string runtimesDirectory = string.Format("runtimes/{0}/native", GetRuntimeIdString());
             var netCorePublishedAppStylePath = Path.Combine(assemblyDirectory, runtimesDirectory, GetNativeLibraryFilename());
             var netCoreAppStylePath = Path.Combine(assemblyDirectory, "../..", runtimesDirectory, GetNativeLibraryFilename());
 
@@ -180,19 +180,20 @@ namespace Grpc.Core.Internal
         }
 #endif
 
-        private static string GetPlatformString()
+        private static string GetRuntimeIdString()
         {
+            string architecture = GetArchitectureString();
             if (PlatformApis.IsWindows)
             {
-                return "win";
+                return string.Format("win-{0}", architecture);
             }
             if (PlatformApis.IsLinux)
             {
-                return "linux";
+                return string.Format("linux-{0}", architecture);
             }
             if (PlatformApis.IsMacOSX)
             {
-                return "osx";
+                return string.Format("osx-{0}", architecture);
             }
             throw new InvalidOperationException("Unsupported platform.");
         }
diff --git a/src/csharp/Grpc.Core/build/net45/Grpc.Core.targets b/src/csharp/Grpc.Core/build/net45/Grpc.Core.targets
index e447a2d0150..3f33b9fca9a 100644
--- a/src/csharp/Grpc.Core/build/net45/Grpc.Core.targets
+++ b/src/csharp/Grpc.Core/build/net45/Grpc.Core.targets
@@ -10,22 +10,22 @@
     the Grpc.Core.dll assembly and the native libraries are used at all times.
   -->
   <ItemGroup Condition="'$(Grpc_SkipNativeLibsCopy)' != 'true'">
-    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win\native\grpc_csharp_ext.x86.dll">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win-x86\native\grpc_csharp_ext.x86.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <Link>grpc_csharp_ext.x86.dll</Link>
       <Visible>false</Visible>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win\native\grpc_csharp_ext.x64.dll">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win-x64\native\grpc_csharp_ext.x64.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <Link>grpc_csharp_ext.x64.dll</Link>
       <Visible>false</Visible>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\linux\native\libgrpc_csharp_ext.x64.so">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\linux-x64\native\libgrpc_csharp_ext.x64.so">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <Link>libgrpc_csharp_ext.x64.so</Link>
       <Visible>false</Visible>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\osx\native\libgrpc_csharp_ext.x64.dylib">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\osx-x64\native\libgrpc_csharp_ext.x64.dylib">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <Link>libgrpc_csharp_ext.x64.dylib</Link>
       <Visible>false</Visible>