Setup DataTable with 3 fields

DataTable.cs

DataTable table = new DataTable("MyTable");
DataColumn idColumn = new DataColumn("id", typeof(int));
DataColumn amountColumn = new DataColumn("amount", typeof(decimal));
DataColumn dateColumn = new DataColumn("date", typeof(DateTime));

table.Columns.Add(idColumn);
table.Columns.Add(amountColumn);
table.Columns.Add(dateColumn);

DataRow newRow = table.NewRow();
newRow["id"] = 1;
newRow["amount"] = 10.3m;
newRow["date"] = new DateTime(2018, 10, 20);
table.Rows.Add(newRow);

newRow = table.NewRow();
newRow["id"] = 2;
newRow["amount"] = 42.1m;
newRow["date"] = new DateTime(2018, 04, 12);
table.Rows.Add(newRow);

newRow = table.NewRow();
newRow["id"] = 2;
newRow["amount"] = 5.6;
newRow["date"] = new DateTime(2018, 07, 2);
table.Rows.Add(newRow);