public void TestMethodSorting()
{
var dview = dv;
//dv = new DataView(dt);
var data = fromXmlToXml.ReadXml("https://www.tcmb.gov.tr/kurlar/today.xml");
dt = data;
var dw = fromXmlToXml.SortingDataTable(dt, "Isim asc,ForexBuying desc");
Assert.IsNotNull(dw, "Datatable not null");
}