public string PayloadToString <Data1, T>() where Data1 : IEnumerable <T>, Data
{
Data1 enumPayload = (Data1)payload;
string content = enumPayload.ElementAt(0).ToString();
if (enumPayload.Count() > 1)
{
for (int i = 1; i < enumPayload.Count(); i++)
{
content += ", " + enumPayload.ElementAt(i).ToString();
}
}
return(content);
}