Regular Expressions Time HH:MM:SS.MMMMMM

	using System;
	using System.Collections;
	using System.ComponentModel;
	using System.Data;
	using System.Drawing;
	using System.Web;
	using System.Web.SessionState;
	using System.Web.UI;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;
	using System.Text.RegularExpressions;
	namespace ConvertTime
	{
	public partial class WebForm1 : System.Web.UI.Page
	{
	Regex r = new Regex(@"^\d{2}:\d{2}:\d{2}.\d{6}$");
	if (!r.IsMatch(TextBox1.Text))
	{
	Response.Write("Sorry. HH:MM:SS.MMMMMM");
	}
	else
	{
	Response.Write("Good, time is" + TextBox1.Text);
	}
	}
	}

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