public void TestMethodCreateJSONContent()
{
var dview = dv;
//dv = new DataView(dt);
var data = fromXmlToXml.ReadXml("https://www.tcmb.gov.tr/kurlar/today.xml");
dt = data;
var content = fromXmlToXml.DataTableToJSONWithStringBuilder(dt);
Assert.AreNotEqual(content, "");
}