How do i remove remove properly letters from my string? : I am trying to get a path for my xml file. 
i got one string with the `.exe` file-
`string exe_location = System.Reflection.Assembly.GetExecutingAssembly().Location;`
and another string to contain the resault-
`string xml_location = exe_location.Remove(exe_location.Length, -11);`
and when im running the code, the debugger suddenly says: "_Count cannot be less than zero.\r\nParameter name: count_"
im not sure how i managed to fail with this simple mission. any ideas? 