File Stream C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
static class Utility
{
    public static string GetApplicationPath()
    {
        string startupFile = System.Reflection.Assembly.GetExecutingAssembly().Location;
        int lastIndex = startupFile.LastIndexOf('\\');
        startupFile = startupFile.Substring(0, lastIndex);
        return startupFile;
    }
}