How to save?

An easy way to do this is to handle the FormClosing event and save the form's current background color to a text file. Then, when the form loads, the text file can be read and the background color set to the appropriate color.

Here's some code:

private void Form1_Load(object sender, EventArgs e)

if (System.IO.File.Exists("formcolor.txt"))

string formColor = System.IO.File.ReadAllText("formcolor.txt");

switch(formColor)

case "Red" :

this.BackColor = Color.Red;

break;

case "Green" :

this.BackColor = Color.Green;

break;

case "Pink" :

this.BackColor = Color.Pink;

break;

default:

this.BackColor = SystemColors.Control; //say

break;

private void Form1_FormClosing(object sender, FormClosingEventArgs e)

System.IO.File.WriteAllText("formcolor.txt", this.BackColor.Name);