Visit 'LiveWorld24.tk' for Live world..............

if (txtWebsite.Text != "")

                {

                    if (!isWeb(txtWebsite.Text))

                    {

                        MessageBox.Show("Please Enter Valid Website Name");

                        txtWebsite.Focus();

                        txtWebsite.SelectAll();

                    }

                    else

                    {

                        txtEmail.Focus();

                        txtEmail.SelectAll();

                    }

                }

                else

                {

                    txtEmail.Focus();

                    txtEmail.SelectAll();

                }

public static bool isWeb(string inputWebsitel)

        {

            return Regex.IsMatch(inputWebsitel,@"^(((ht|f)tp(s?))\://)?(www.|[a-zA-Z].)[a-zA-Z0-9\-\.]+\.(com|edu|gov|mil|net|org|biz|info|name|museum|us|ca|uk)(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$");

        }