.NET9: Fixes WebAssembly or browser scenarios by conditionally setting the ConnectionLimit (#5049)

# Pull Request Template

## Description

Don't use ServicePoint at all on Browser.

in net9.0 all of [ServicePoint throws
PlatformNotSupported](dotnet/runtime#113174)
so don't attempt to use it there.

## Type of change

Please delete options that are not relevant.

- [] Bug fix (non-breaking change which fixes an issue)
- [] New feature (non-breaking change which adds functionality)
- [] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [] This change requires a documentation update

## Closing issues

closes: #5029

---------

Co-authored-by: Miha Zupan <[email protected]>
Co-authored-by: Kiran Kumar Kolli <[email protected]>

Author: 3 people

Microsoft.Azure.Cosmos/src/Routing/LocationCache.cs

@@ -859,8 +859,11 @@ internal bool CanUseMultipleWriteLocations()
         private void SetServicePointConnectionLimit(Uri endpoint)
         {
 #if !NETSTANDARD16
-            ServicePointAccessor servicePoint = ServicePointAccessor.FindServicePoint(endpoint);
-            servicePoint.ConnectionLimit = this.connectionLimit;
+            if (ServicePointAccessor.IsSupported)
+            {
+                ServicePointAccessor servicePoint = ServicePointAccessor.FindServicePoint(endpoint);
+                servicePoint.ConnectionLimit = this.connectionLimit;
+            }
 #endif
         }
 

Microsoft.Azure.Cosmos/src/Util/ServicePointAccessor.cs

@@ -1,4 +1,4 @@
-//------------------------------------------------------------
+//------------------------------------------------------------
 // Copyright (c) Microsoft Corporation.  All rights reserved.
 //------------------------------------------------------------
 
@@ -15,7 +15,7 @@ namespace Microsoft.Azure.Cosmos
     internal class ServicePointAccessor
     {
         // WebAssembly detection
-        private static readonly bool IsBrowser = RuntimeInformation.IsOSPlatform(OSPlatform.Create("BROWSER")) || RuntimeInformation.IsOSPlatform(OSPlatform.Create("WEBASSEMBLY"));
+        public static readonly bool IsSupported = !(RuntimeInformation.IsOSPlatform(OSPlatform.Create("BROWSER")) || RuntimeInformation.IsOSPlatform(OSPlatform.Create("WEBASSEMBLY")));
 
         private readonly ServicePoint servicePoint;
 
@@ -54,7 +54,7 @@ private void TryDisableUseNagleAlgorithm()
 
         private void TrySetConnectionLimit(int connectionLimit)
         {
-            if (ServicePointAccessor.IsBrowser)
+            if (!ServicePointAccessor.IsSupported)
             {
                 // Workaround for WebAssembly.
                 // WebAssembly currently throws a SynchronizationLockException and not a PlatformNotSupportedException.