public object DataSource { get; set; }

Public Property DataSource As Object

treeList1.DataSource = CreateTLData(100);

DataTable CreateTLData(int recordCount)
{
    Random rnd = new Random();
    DataTable tbl = new DataTable();
    tbl.Columns.Add("ID", typeof(int));
    tbl.Columns.Add("ParentID", typeof(int));
    tbl.Columns.Add("Name", typeof(string));
    tbl.Columns.Add("Date", typeof(DateTime));
    tbl.Columns.Add("Checked", typeof(bool));
    for (int i = 0; i < recordCount; i++)
        tbl.Rows.Add(new object[] { i, rnd.Next(20), String.Format("Name{0}", i), DateTime.Now.Date.AddDays(rnd.Next(-250, 250)), rnd.Next(2) == 0 });
    return tbl;
}

treeList1.DataSource = CreateTLData(100)

DataTable CreateTLData(Integer recordCount)
    Dim rnd As New Random()
    Dim tbl As New DataTable()
    tbl.Columns.Add("ID", GetType(Integer))
    tbl.Columns.Add("ParentID", GetType(Integer))
    tbl.Columns.Add("Name", GetType(String))
    tbl.Columns.Add("Date", GetType(Date))
    tbl.Columns.Add("Checked", GetType(Boolean))
    For i As Integer = 0 To recordCount - 1
        tbl.Rows.Add(New Object() { i, rnd.Next(20), String.Format("Name{0}", i), Date.Now.Date.AddDays(rnd.Next(-250, 250)), rnd.Next(2) = 0 })
    Next i
    Return tbl

skipMasterFiltering = true;
tree.DataSource = null;
tree.ParentFieldName = tree.KeyFieldName = string.Empty;

control.BeginUpdate();
control.DataSource = controlDataSource;
control.RefreshDataSource();

MyTtreeList.SelectImageList = imageListForTree;
    MyTtreeList.DataSource = new object();
}

public override void SetDataSource(object dataSource) {
    TreeList.DataSource = new TreeListDataSet((IEnumerable<TokenEditToken>)dataSource);
    TreeList.ExpandAll();

InitializeComponent();
treeList1.DataSource = CreateDataset_Table().Tables["Customers"];
CustomAnyControlEditRepositoryItem CustomRepository = new CustomAnyControlEditRepositoryItem();

skipMasterFiltering = True
tree.DataSource = Nothing
tree.KeyFieldName = String.Empty

MyTtreeList.SelectImageList = imageListForTree
    MyTtreeList.DataSource = New Object()
End Sub

Public Overrides Sub SetDataSource(ByVal dataSource As Object)
    TreeList.DataSource = New TreeListDataSet(DirectCast(dataSource, IEnumerable(Of TokenEditToken)))
    TreeList.ExpandAll()

Private Sub InitTreeList()
    treeList1.DataSource = SalesDataGenerator.CreateData()
    ' Create and customize an unbound column.

subReport.ReportSource = childReport
parentForm.treeList1.DataSource = helperField.ReportDataSource
parentForm.treeList1.ExpandAll()