Fixed sample

Author: ManickaP

snippets/csharp/System.Net.Http/WinHttpHandler/Project.csproj

@@ -2,7 +2,11 @@
 
   <PropertyGroup>
     <OutputType>Library</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
-   
+
+  <ItemGroup>
+    <PackageReference Include="System.Net.Http.WinHttpHandler" Version="9.0.6" />
+  </ItemGroup>
+
 </Project>

snippets/csharp/System.Net.Http/WinHttpHandler/program.cs

@@ -1,25 +1,29 @@
 using System;
 using System.Net;
 using System.Net.Http;
-using System.Net.Sockets;
-using System.Threading.Tasks;
+using System.Net.Security;
 
 class WinHttpHandler_SecureExample
 {
-    static async Task Main()
+    static void Main()
     {
+        if (!OperatingSystem.IsWindows())
+        {
+            Console.WriteLine("This example requires Windows.");
+            return;
+        }
         // <Snippet1>
         var handler = new WinHttpHandler();
-        handler.ServerCertificateValidationCallback = (httpRequestMessage, certificate, chain, sslPolicyErrors)
+        handler.ServerCertificateValidationCallback = (httpRequestMessage, certificate, chain, sslPolicyErrors) =>
         {
-             if (sslPolicyErrors == SslPolicyErrors.None)
+            if (sslPolicyErrors == SslPolicyErrors.None)
+            {
+                // TODO: Implement additional custom certificate validation logic here.
                 return true;
-
-            Console.WriteLine("Certificate error: {0}", sslPolicyErrors);
-
+            }
             // Do not allow this client to communicate with unauthenticated servers.
             return false;
-        }
+        };
         // </Snippet1>
     }
 }