Javascript Alert in C#

/// <summary>

/// A JavaScript alert 

/// </summary>

public static class Alert

{

    /// <summary>

    /// Shows a client-side JavaScript alert in the browser.
    ///
</summary>

    /// <param name="message">The message to appear in the alert.
</param>

    public static void Show(string message)

    {

        // Cleans the message to allow single quotation marks

        string cleanMessage = message.Replace("'", "\\'");
        string script = string.Format("<script type=\"text/javascript\">$(document).ready(function(){alert('{0}');});</script>", cleanMessage);

       
// Gets the executing web page

        Page page = HttpContext.Current.CurrentHandler as Page;

       
// Checks if the handler is a Page and that the script isn't all ready on the Page

        if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("alert"))

        {

            page.ClientScript.RegisterClientScriptBlock(typeof(Alert), "alert", script);

        }

    }

}