Target net462 for gRPC WinHttpHandler support

Author: roji

Directory.Packages.props

@@ -1,9 +1,9 @@
 <Project>
 
   <ItemGroup>
-    <PackageVersion Include="Google.Protobuf" Version="3.23.4" />
-    <PackageVersion Include="Grpc.Net.Client" Version="2.55.0" />
-    <PackageVersion Include="Grpc.Tools" Version="2.56.2" />
+    <PackageVersion Include="Google.Protobuf" Version="3.24.2" />
+    <PackageVersion Include="Grpc.Net.Client" Version="2.56.0" />
+    <PackageVersion Include="Grpc.Tools" Version="2.57.0" />
     <PackageVersion Include="System.Text.Json" Version="7.0.3" />
     <PackageVersion Include="Microsoft.Bcl.HashCode" Version="1.1.1" />
 

Milvus.Client/Milvus.Client.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;netstandard2.0</TargetFrameworks>
+    <!-- We target net462 directly since the net462 version of Grpc.Net.Client automatically uses WinHttpHandler -->
+    <TargetFrameworks>net6.0;netstandard2.0;net462</TargetFrameworks>
     <TargetFrameworks Condition="'$(DeveloperBuild)' == 'True'">net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <AnalysisMode>All</AnalysisMode>