c# | check if string contains symbol c#

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check if string contains symbol using C#

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// default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Class1.aspx.cs" Inherits="_Default" %>
<script runat="server">

protected void Page_Load(object sender, EventArgs e)
{
Response.Write(checksymbol("string"));
}

</script>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>

</body>
</html>

// Class1.aspx.cs

using System;
using System.Web;
using System.Web.Services;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;

public partial class _Default: System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{
}
[WebMethod]
public static string checksymbol(string mysymbol)
{

string mycheck = "String contains a symbol";

if (!Regex.IsMatch(mysymbol, @"[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]", RegexOptions.ECMAScript))
mycheck = "Password must include at least one symbol! ";

return mycheck;

}

}