Resources for visualizing data using C# and the .NET platform
How to draw with Maui.Graphics in a Windows Forms application

This page describes how to draw using Maui.Graphics from a Windows Forms application.

1. Create a WinForms Application

dotnet new WinForms

2. Add NuGet Packages

dotnet add package Microsoft.Maui.Graphics
dotnet add package Microsoft.Maui.Graphics.Skia
dotnet add package SkiaSharp.Views.WindowsForms

3. Add a SkiaSharp Control

Drag a SKGLControl from the toolbox and drop it onto your Form.

4. Draw Graphics

Double-click the SKGLControl to create a PaintSurface EventHandler and method where you can add your drawing code:

private void skglControl1_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintGLSurfaceEventArgs e)
    ICanvas canvas = new SkiaCanvas() { Canvas = e.Surface.Canvas };

    canvas.FillColor = Colors.Navy;
    canvas.FillRectangle(0, 0, skglControl1.Width, skglControl1.Height);

    canvas.StrokeColor = Colors.White.WithAlpha(.5f);
    canvas.StrokeSize = 2;
    for (int i = 0; i < 100; i++)
        float x = Random.Shared.Next(skglControl1.Width);
        float y = Random.Shared.Next(skglControl1.Height);
        float r = Random.Shared.Next(5, 50);
        canvas.DrawCircle(x, y, r);

5. Render on Events

It is often a good idea to re-render when the window size changes

private void skglControl1_SizeChanged(object s, EventArgs e) => skglControl1.Invalidate();

You can also request renders manually or automatically using a timer

private void button1_Click(object s, EventArgs e) => skglControl1.Invalidate();
private void timer1_Tick(object s, EventArgs e) => skglControl1.Invalidate();