Open File Dialog Box

OpenFile Dialog Box to select a file. For a wrong input (filename) it will show a error message.

private void btnOpenTextFile_Click(object sender, System.EventArgs e) 
	{
		StreamReader ts = null;
		try 
		{		
		odlgTextFile.CheckFileExists = true;

		// Check to ensure that the selected
		// path exists.  Dialog box displays 
		// a warning otherwise.

		odlgTextFile.CheckPathExists = true;		

		odlgTextFile.DefaultExt = "txt";

		// return the file referenced by a link? if 
		// false, simply returns the selected link
		// file. if true, returns the file linked to 
		// the LNK file.

		odlgTextFile.DereferenceLinks = true;

		// Just in VB6, use a set of pairs
		// of filters, separated with "|". Each 
		// pair consists of a description|file spec.
		// Use a "|" between pairs. No need to put a
		// trailing "|". You can set the FilterIndex
		// property well, to select the default
		// filter. Amazingly, the first filter is 
		// numbered 1 (! 0). The default is 1. 

		odlgTextFile.Filter = "Text files (*.txt)|*.txt|" + "All files|*.*";

		odlgTextFile.Multiselect = false;

		// Restore the original directory when done selecting
		// a file? if false, the current directory changes
		// to the directory in which you selected the file.
		// Set this to true to put the current folder back
		// where it was when you started.
		// The default is false.

		odlgTextFile.RestoreDirectory = true;

		// Show the Help button and Read-Only checkbox?

		odlgTextFile.ShowHelp = true;

		odlgTextFile.ShowReadOnly = false;

		// Start out with the read-only check box checked?
		// This only make sense if ShowReadOnly is true.
		// .ReadOnlyChecked = false

		odlgTextFile.Title = "Select a file to open";

		// Only accept valid Win32 file names?

		odlgTextFile.ValidateNames = true;

		if (odlgTextFile.ShowDialog() == DialogResult.OK)
	        {
		 FileName = odlgTextFile.FileName;
		 ts = new StreamReader(odlgTextFile.OpenFile());
		 txtFileContents.Text = ts.ReadToEnd();
	        }
	}			
	catch (Exception exp) 
	{
		MessageBox.Show(exp.Message, this.Text);
	}
	finally
	{
	       if(ts != null)
		{
			ts.Close();
		}
	}
}