System.Data.Tests.DataSetTest2.HasChanges_ByDataRowState C# (CSharp) Method

        public void HasChanges_ByDataRowState()
        {
            var ds = new DataSet();

            DataRow dr;
            ds.Tables.Add(DataProvider.CreateParentDataTable());

            // HasChanges 1
            Assert.Equal(false, ds.HasChanges());

            //make some changes

            dr = ds.Tables[0].Rows[1];
            dr.Delete();

            dr = ds.Tables[0].Rows[2];
            dr[1] = "NewValue";

            dr = ds.Tables[0].Select("", "", DataViewRowState.Unchanged)[0];

            dr = ds.Tables[0].NewRow();
            dr[0] = 1;
            ds.Tables[0].Rows.Add(dr);

            // HasChanges Added
            Assert.Equal(true, ds.HasChanges(DataRowState.Added));

            // HasChanges Deleted
            Assert.Equal(true, ds.HasChanges(DataRowState.Deleted));

            // HasChanges Modified
            Assert.Equal(true, ds.HasChanges(DataRowState.Modified));

            // HasChanges Unchanged
            Assert.Equal(true, ds.HasChanges(DataRowState.Unchanged));
        }