C#

DataTable   t = new DataTable();
 
t.TableName = "test";
t.Columns.AddRange(
   new DataColumn[] {
      new DataColumn("one", typeof(string)),
      new DataColumn("two", typeof(int)),
      new DataColumn("three", typeof(DateTime)),
      new DataColumn("four", typeof(string)),
      new DataColumn("five", typeof(bool)),
      new DataColumn("six", typeof(double))
   });
 
dataGrid1.DataSource = t;