How to Escape Special Characters in XML from C#

I have written a code which escape special characters in XML while posting an XML Request. Here is the sample code sample.

private string EscapeXMLillegalCharacters (string strValue)
{
    return strValue.Replace("&", "&amp;").Replace("'", "&apos;").Replace("\"", "&quot;").Replace("<", "&lt;").Replace(">", "&gt;");
}

Hope this is useful. Happy coding