Answer / guest

using System.Text.RegularExpressions;
The second step is to detect a URL:

Regex urlregex = new Regex(@"(http:\/\/([\w.]+\/?)\S*)",
RegexOptions.IgnoreCase|RegexOptions.Compiled);

Here is how to detect an e-mail address:

Regex emailregex = new
Regex(@"([a-zA-Z_0-9.-]+\@[a-zA-Z_0-9.-]+\.\w+)",
RegexOptions.IgnoreCase|RegexOptions.Compiled);



private void Button1_Click(object sender, System.EventArgs
e)
{
string strContent = InputTextBox.Text;
Regex urlregex = new Regex(@"(http:\/\/([\w.]+\/?)\S*)",
RegexOptions.IgnoreCase|
RegexOptions.Compiled);
strContent = urlregex.Replace(strContent,
"");
Regex emailregex = new
Regex(@"([a-zA-Z_0-9.-]+\@[a-zA-Z_0-9.-]+\.\w+)",
RegexOptions.IgnoreCase| RegexOptions.Compiled);
strContent = emailregex.Replace(strContent, "");
lbContent.Text += ""+strContent;
}

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