System.Data.Tests.DataColumnCollectionTest.CopyTo C# (CSharp) Method

        public void CopyTo()
        {
            DataTable Table = new DataTable("test_table");
            DataColumnCollection Cols = Table.Columns;

            Cols.Add("test");
            Cols.Add("test2");
            Cols.Add("test3");
            Cols.Add("test4");

            DataColumn[] array = new DataColumn[4];
            Cols.CopyTo(array, 0);
            Assert.Equal(4, array.Length);
            Assert.Equal("test", array[0].ColumnName);
            Assert.Equal("test2", array[1].ColumnName);
            Assert.Equal("test3", array[2].ColumnName);
            Assert.Equal("test4", array[3].ColumnName);

            array = new DataColumn[6];
            Cols.CopyTo(array, 2);
            Assert.Equal(6, array.Length);
            Assert.Equal("test", array[2].ColumnName);
            Assert.Equal("test2", array[3].ColumnName);
            Assert.Equal("test3", array[4].ColumnName);
            Assert.Equal("test4", array[5].ColumnName);
            Assert.Null(array[0]);
            Assert.Null(array[1]);
        }