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C#: Extension method with Regular expression to check or validate if a string is a valid GUID

So here I am writing another extension method for String to validate if sting value is a valid Guid or not with the help of regular expression.

using System;
using System.Text.RegularExpressions;
public static class StringExtensions
{
    public static bool IsValidGuid(this String inputValue)
    {
        Regex isGuid = new Regex(@"^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$", RegexOptions.Compiled);
        bool isValid = false;
        if (!String.IsNullOrWhiteSpace(inputValue))
        {
            isValid = isGuid.IsMatch(inputValue);
        }
        return isValid;
    }
}

And here is how you can use this:

String testString = "6FE4851B-27A9-4D18-A51D-36B262023F39";
if (testString.IsValidGuid())
{
    Response.Write("String is a valid GUID");
}
else
{
    Response.Write("String is not a valid GUID");
}

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