Use string for SNI instead of byte[]

Author: twsouthwick

src/Microsoft.Data.SqlClient/src/Interop/Windows/Sni/SniNativeWrapper.cs

@@ -344,7 +344,8 @@ internal static unsafe uint SNIOpenSyncEx(
                     case (2):
                         clientConsumerInfo.transparentNetworkResolution = TransparentNetworkResolutionMode.ParallelMode;
                         break;
-                };
+                }
+                ;
                 clientConsumerInfo.totalTimeout = totalTimeout;
 #else
                 clientConsumerInfo.transparentNetworkResolution = TransparentNetworkResolutionMode.DisabledMode;