get virtual path from physical path

Here openfile.Filename gives physical path which i couldnt access from other system other than my localsystem

I need virtual path so that i can access from anywhere


System.Windows.Forms.OpenFileDialog openfile = new System.Windows.Forms.OpenFileDialog();
openfile.ShowDialog();
string pathname = Path.GetFileName(openfile.FileName);
byte[] byteArray =System.Text.Encoding.UTF8.GetBytes(openfile.FileName);