Never use raw arguments when running on Mono (#14798)

src/Compilers/Shared/BuildClient.cs

@@ -171,7 +171,7 @@ public Task<RunCompilationResult> RunCompilationAsync(IEnumerable<string> origin
 
         protected static IEnumerable<string> GetCommandLineArgs(IEnumerable<string> args)
         {
-            if (IsRunningOnWindows)
+            if (UseNativeArguments())
             {
                 return GetCommandLineWindows(args);
             }
@@ -179,6 +179,21 @@ protected static IEnumerable<string> GetCommandLineArgs(IEnumerable<string> args
             return args;
         }
 
+        private static bool UseNativeArguments()
+        {
+            if (!IsRunningOnWindows)
+            {
+                return false;
+            }
+
+            if (Type.GetType("Mono.Runtime") != null)
+            {
+                return false;
+            }
+
+            return true;
+        }
+
         /// <summary>
         /// When running on Windows we can't take the commmand line which was provided to the 
         /// Main method of the application.  That will go through normal windows command line