prog.cs(1,17): error CS0234: The type or namespace name `Xna' does not exist in the namespace `Microsoft'. Are you missing an assembly reference?
prog.cs(2,17): error CS0234: The type or namespace name `Xna' does not exist in the namespace `Microsoft'. Are you missing an assembly reference?
prog.cs(8,16): error CS0246: The type or namespace name `Rectangle' could not be found. Are you missing `System.Drawing' using directive?
prog.cs(9,16): error CS0246: The type or namespace name `Texture2D' could not be found. Are you missing an assembly reference?
prog.cs(12,35): error CS0246: The type or namespace name `SpriteBatch' could not be found. Are you missing an assembly reference?
Compilation failed: 5 error(s), 0 warnings