Removing Border from WinForms UserControl

Question

I have UserControl with black border inside. I want to remove the border or change its color.

.

Found solution but it does not remove the border:

public FolderView() {
    InitializeComponent();
    base.BorderStyle = BorderStyle.None;
    this.BorderStyle = BorderStyle.None;
}

private BorderStyle border;

public new BorderStyle BorderStyle {
    get { return border; }
    set {
        border = value;
        Invalidate();
    }
}

Control is taken from this project .

UPDATE: I am trying to draw new border. Added these lines of code at the end of OnPaint method in TreeListView class:

Rectangle rect = base.ClientRectangle;
ControlPaint.DrawBorder(e.Graphics, rect, Color.DarkBlue, ButtonBorderStyle.Solid);

However Vertical Scrollbar is painted over my border. How to resolve this? Also tried same code in FolderViewTree class, but scrollbar pushes border to the left (I want to have scrollbar within the border as it was originally).

Answer 1

As mentioned in the comments, the border belongs to the TreeView . Attached is the screenshot of the designer where you should change the border to None . (Currently, it's set to FixedSingle ).