prog.cs(4,20): error CS0103: The name `Directory' does not exist in the current context
prog.cs(8,20): error CS0103: The name `Directory' does not exist in the current context
prog.cs(13,20): error CS0103: The name `Directory' does not exist in the current context
error CS5001: Program `prog.exe' does not contain a static `Main' method suitable for an entry point
Compilation failed: 4 error(s), 0 warnings