Question

I am trying to show listbox in but it didnt works, this code in datagridview_mouseClick event:
With debugger it passes all lines below, but show nothing

ListBox lb = new ListBox();
 lb.Size = new Size(200, 300);
 lb.Location = new Point(500, 500);
 lb.Items.Add("a");
 lb.Items.Add("b");
 lb.BringToFront();
 listBox1.Show();

Any idea where is the problem?
EDIT: My datagridview is in tableLayout and docked – could it be problem?
I am using winforms and c#

Answer 1

The ListBox has to be contained in something (like your form):

this.Controls.Add(lb);

The appropriate place to add it depends on where and how you want it to appear.