System.Data.Tests.DataColumnCollectionTest2.Add_DataColumn3 C# (CSharp) Метод

        public void Add_DataColumn3()
        {
            DataTable dt = new DataTable();
            DataColumn col = new DataColumn("col1", Type.GetType("System.String"));
            dt.Columns.Add(col);
            Assert.Throws<DuplicateNameException>(() =>
            {
                DataColumn col1 = new DataColumn("col1", Type.GetType("System.String"));
                dt.Columns.Add(col1);
            });
        }