how to change all window forms color in C#

Color clr; private void toolStripButton1_Click(object sender, EventArgs e) { ColorDialog clDg = new ColorDialog(); if (clDg.ShowDialog() == DialogResult.OK) { clr = clDg.Color; } foreach (Control ctl in this.Controls) { if (ctl is MdiClient) { ctl.BackColor = clr; } } } private void Form1_MdiChildActivate(object sender, EventArgs e) { foreach (Form form in Application.OpenForms) { form.BackColor = clr; } }

click your targeted form and go to properties then change back ground colour .