Chnage backgrounf color of a form

[C# Programming]

Hi All

I am very new to C#,and i have to set background color of my form, i am trying to do like

Assembly myAssembly = Assembly.GetExecutingAssembly();
Stream testImage= myAssembly.GetManifestResourceStream("Test.jpg");
but here it crashing.

can anybody help me out

thanks in advance
RYK