Add System.Net.ServerSentEvents to runtime shared framework (#112930)

Author: captainsafia

src/libraries/NetCoreAppLibrary.props

@@ -96,6 +96,7 @@
       System.Net.Quic;
       System.Net.Requests;
       System.Net.Security;
+      System.Net.ServerSentEvents;
       System.Net.ServicePoint;
       System.Net.Sockets;
       System.Net.WebClient;

src/libraries/System.Net.ServerSentEvents/ref/System.Net.ServerSentEvents.csproj

@@ -17,4 +17,11 @@
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Bcl.AsyncInterfaces\src\Microsoft.Bcl.AsyncInterfaces.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Memory\ref\System.Memory.csproj" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Threading\ref\System.Threading.csproj" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime\ref\System.Runtime.csproj" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.InteropServices\ref\System.Runtime.InteropServices.csproj" />
+  </ItemGroup>
+
 </Project>

src/libraries/System.Net.ServerSentEvents/src/System.Net.ServerSentEvents.csproj

@@ -34,4 +34,11 @@ System.Net.ServerSentEvents.SseParser</PackageDescription>
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="$(SystemThreadingTasksExtensionsVersion)" />
   </ItemGroup>
 
+   <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <Reference Include="System.Memory" />
+    <Reference Include="System.Threading" />
+    <Reference Include="System.Runtime" />
+    <Reference Include="System.Runtime.InteropServices" />
+  </ItemGroup>
+
 </Project>