public static IDictionary<string, string> ToDictionary(string prefix)
{
IDictionary<string, string> result = new Dictionary<string, string>();
result["groupBy"] = prefix + GroupBy;
result["orderBy"] = prefix + OrderBy;
result["page"] = prefix + CurrentPage;
result["size"] = prefix + PageSize;
result["filter"] = prefix + Filter;
result["mode"] = prefix + Mode;
return result;
}