Validating URL using C# with Regular Expression with and without http

Without using Http

    public bool ValidateUrl(string url)

    {

        // regex pattern for url validation string

        Regex RgxUrl = new Regex("(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)?/{0,2}[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?");

        if (RgxUrl.IsMatch(url))

        {

            return true;

        }

        else

        {

            return false;

        }

    }

By Using Http

    private bool ValidateHttpUrl(string url)

    {

        System.Globalization.CompareInfo cmpUrl = System.Globalization.CultureInfo.InvariantCulture.CompareInfo;

        if (cmpUrl.IsPrefix(txtUrl.Text, "http://") == false)

        {

            txtUrl.Text = "http://" + txtUrl.Text;

        }

        Regex RgxUrl = new Regex("(([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)?/{0,2}[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?(#[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)?");

        if (RgxUrl.IsMatch(url))

        {

            return true;

        }

        else

        {

            return false;

        }

    }

Have a nice day... 'N happy Coding :)