.net 动态构建datatable

datatable dt=new datatable();

dt.Columns.Add("列名1", typeof(System.Int32));

dt.Columns.Add("列名2", typeof(System.String));
dt.Columns.Add("列名3", typeof(System.String));
dt.Columns.Add("列名4", typeof(System.String));

DataRow NewRow = dt.NewRow();
NewRow["列名1"] = 1;
NewRow["列名2"] = “11”;
NewRow["列名3"] = “11”;
NewRow["列名4"] = “11”;