Five yellow squares with different alpha values(Transparensy) : Color « 2D Graphics « C# / C Sharp

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C# / C Sharp » 2D Graphics » ColorScreenshots 
Five yellow squares with different alpha values(Transparensy)

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form
  static void Main() 
    Application.Run(new Form1());
  protected override void OnPaint(PaintEventArgs e)
    Graphics g;
    g = Graphics.FromHwnd(this.Handle);

    g.FillRectangle(new SolidBrush(Color.Red)101021050);

    Rectangle r = new Rectangle(40203030);
    Color c = Color.FromArgb(2552552550);
    g.FillRectangle(new SolidBrush(c), r);

    c = Color.FromArgb(2002552550);
    g.FillRectangle(new SolidBrush(c), r);

    c = Color.FromArgb(1502552550);
    g.FillRectangle(new SolidBrush(c), r);

    c = Color.FromArgb(1002552550);
    g.FillRectangle(new SolidBrush(c), r);

    c = Color.FromArgb(502552550);
    g.FillRectangle(new SolidBrush(c), r);


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