mcs Mainform.cs
Mainform.cs(3,14): error CS0234: The type or namespace name `Drawing' does not exist in the namespace `System'. Are you missing `System.Drawing' assembly reference?
Mainform.cs(7,22): error CS0234: The type or namespace name `Forms' does not exist in the namespace `System.Windows'. Are you missing `System.Windows.Forms' assembly reference?
Mainform.cs(8,7): error CS0246: The type or namespace name `RT' could not be found. Are you missing an assembly reference?
Mainform.cs(9,7): error CS0246: The type or namespace name `RT' could not be found. Are you missing an assembly refe…