public static class DataSetExt
{
	public static void FromBase64String(this DataSet dataSet, string str)
	{
		var splited = str.Split('|');
		var msSchema = new MemoryStream(Convert.FromBase64String(splited[0]));
		var msData = new MemoryStream(Convert.FromBase64String(splited[1]));

		dataSet.ReadXmlSchema(msSchema);
		dataSet.ReadXml(msData);
	}

	public static string ToBase64String(this DataSet dataSet)
	{
		MemoryStream msSchema = new MemoryStream();
		dataSet.WriteXmlSchema(msSchema);

		MemoryStream msData = new MemoryStream();
		dataSet.WriteXml(msData, XmlWriteMode.DiffGram);

		return Convert.ToBase64String(msSchema.ToArray()) + "|" + Convert.ToBase64String(msData.ToArray());
	}
}