Csharp/C Sharp/Development Class/Application

StartupPath

 
using System;
using System.Windows.Forms;
class MainClass {
    static void Main(string[] args) {
        OpenFileDialog dlg = new OpenFileDialog();
        dlg.InitialDirectory = Application.StartupPath;
        if (dlg.ShowDialog() == DialogResult.OK) {
            Console.WriteLine(dlg.FileName);
        }
    }
}