System.Data.DataTable.EndInit C# (CSharp) Method

        public virtual void EndInit()
        {
            if (_dataSet == null || !_dataSet._fInitInProgress)
            {
                Columns.FinishInitCollection();
                Constraints.FinishInitConstraints();
                foreach (DataColumn dc in Columns)
                {
                    if (dc.Computed)
                    {
                        dc.Expression = dc.Expression;
                    }
                }
            }

            fInitInProgress = false; // It is must that we set off this flag after calling FinishInitxxx();
            if (_delayedSetPrimaryKey != null)
            {
                PrimaryKey = _delayedSetPrimaryKey;
                _delayedSetPrimaryKey = null;
            }

            if (_delayedViews.Count > 0)
            {
                foreach (DataView dv in _delayedViews)
                {
                    dv.EndInit();
                }
                _delayedViews.Clear();
            }

            OnInitialized();
        }

		[Test] public void BeginInitTest ()
		{
			DataSet ds = new DataSet ();

			DataTable table1 = new DataTable ("table1");
			DataTable table2 = new DataTable ("table2");

			DataColumn col1 = new DataColumn ("col1", typeof (int));
			DataColumn col2 = new DataColumn ("col2", typeof (int));
			table1.Columns.Add (col1);
			table2.Columns.Add (col2);
			
			UniqueConstraint pkey = new UniqueConstraint ("pk", new string[] {"col1"}, true);
			ForeignKeyConstraint fkey = new ForeignKeyConstraint ("fk", "table1", new String[] {"col1"}, 
								new String[] {"col2"}, AcceptRejectRule.Cascade,
								Rule.Cascade, Rule.Cascade);
			DataRelation relation = new DataRelation ("rel", "table1", "table2", new String[] {"col1"},
								 new String[] {"col2"}, false);
			ds.BeginInit ();
			table1.BeginInit ();
			table2.BeginInit ();

			ds.Tables.AddRange (new DataTable[] {table1, table2});
			ds.Relations.AddRange (new DataRelation[] {relation});
			
			table1.Constraints.AddRange (new Constraint[] {pkey});
			table2.Constraints.AddRange (new Constraint[] {fkey});

			// The tables/relations shud not get added to the DataSet yet
			Assert.AreEqual (0, ds.Tables.Count, "#1");
			Assert.AreEqual (0, ds.Relations.Count, "#2");
			Assert.AreEqual (0, table1.Constraints.Count, "#3");
			Assert.AreEqual (0, table2.Constraints.Count, "#4");
			ds.EndInit ();

			Assert.AreEqual (2, ds.Tables.Count, "#5");
			Assert.AreEqual (1, ds.Relations.Count, "#6");
			Assert.AreEqual (1, ds.Tables [0].Constraints.Count, "#7");
			Assert.AreEqual (1, ds.Tables [1].Constraints.Count, "#8");

			// Table shud still be in BeginInit .. 
			DataColumn col3 = new DataColumn ("col2");
			UniqueConstraint uc = new UniqueConstraint ("uc", new string[] {"col2"}, false);

			table1.Columns.AddRange (new DataColumn[] {col3});
			table1.Constraints.AddRange (new Constraint[] {uc});

			Assert.AreEqual (1, table1.Columns.Count, "#9");
			Assert.AreEqual (1, table1.Constraints.Count, "#10");

			table1.EndInit ();
			Assert.AreEqual (2, table1.Columns.Count, "#11");
			Assert.AreEqual (2, table1.Columns.Count, "#12");
		}