New Post: Propertygrid CheckedTreeView (DropDownButton)

var subDemo111 = new CustomPropertyItem() { DisplayName = "subDemo111", Value = false };
var subDemo11 = new CustomPropertyItem() { DisplayName = "subDemo11", Value = false, IsExpandable = true };
subDemo11.Properties.Add( subDemo111 );

var subDemo12 = new CustomPropertyItem() { DisplayName = "subDemo12", Value = false};

var demo1 = new CustomPropertyItem() { DisplayName = "Demo1", Value = false, IsExpandable = true };
demo1.Properties.Add( subDemo11 );
demo1.Properties.Add( subDemo12 );

var demo2 = new CustomPropertyItem() { DisplayName = "Demo2", Value = false };

_propertyGrid.Properties.Add( demo1 );
 _propertyGrid.Properties.Add( demo2 );