Got to repo.

23. Flickering issue

This library use the Windows GDI+ technology meant to be used to draw Controls and it allow to draw some stuff as shapes, images ... unfortunatly there's a flickering issue known in the GDI+ that i experianced in some old .Net Framework versions maybe 4.0 more or less, i don't remember.

So if it's the case for you, you can enable Double buffering after InitializeComponent(); in the form's constructor.

                        
using System.Windows.Forms;

namespace _2dProject
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.DoubleBuffer, true);
            this.Invalidate();
        }
    }
}
                        
                      

Remembre that if you don't experiment this issue then no need to add that code.

End :)