/// <summary>
/// Appends or updates a query string value to the current Url
/// </summary>
/// <param name="key">The query string key</param>
/// <param name="value">The query string value</param>
/// <returns>The updated Url</returns>
public static string AppendOrUpdateQueryString(this UmbracoHelper umbraco, string key, string value)
{
return(umbraco.AppendOrUpdateQueryString(HttpContext.Current.Request.RawUrl, key, value));
}