Using Save As Dialog in WPF

 1                 Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
 2                 dlg.FileName = "User.txt"; // Default file name
 3                 dlg.DefaultExt = ".txt"; // Default file extension
 4                 dlg.Filter = "Text documents (.txt)|*.txt"; // Filter files by extension
 5 
 6                 var dir = System.IO.Path.GetDirectoryName(this.txtPlace.Text);
 7                 dlg.InitialDirectory = dir;
 8 
 9                 // Show save file dialog box
10                 Nullable<bool> result = dlg.ShowDialog();
11 
12                 // Process save file dialog box results
13                 if (result == true)
14                 {
15                     // Save document
16                     this.txtPlace.Text = dlg.FileName;
17                 }