/// <summary>Ask user for a filename to open.</summary>
 /// <param name="fileSpec">The file specification to use to filter the files.</param>
 /// <param name="initialDirectory">Optional Initial starting directory</param>
 public string AskUserForOpenFileName(string fileSpec, string initialDirectory = "")
 {
     return(view.AskUserForOpenFileName(fileSpec, initialDirectory));
 }