Apply suggested changes

Author: David-Engel

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/ManagedSni/SniError.netcore.cs

@@ -42,9 +42,9 @@ public SniError(SniProviders provider, uint sniErrorCode, Exception sniException
             lineNumber = 0;
             function = string.Empty;
             this.provider = provider;
+            nativeError = nativeErrorCode;
             if (nativeErrorCode == 0)
             {
-                nativeError = nativeErrorCode;
                 if (sniException is SocketException socketException)
                 {
                     // SocketErrorCode values are cross-plat consistent in .NET (matching native Windows error codes)
@@ -55,10 +55,6 @@ public SniError(SniProviders provider, uint sniErrorCode, Exception sniException
                     nativeError = (uint)win32Exception.NativeErrorCode; // Replicates native SNI behavior
                 }
             }
-            else
-            {
-                nativeError = nativeErrorCode;
-            }
             sniError = sniErrorCode;
             errorMessage = string.Empty;
             exception = sniException;