可以呀，,,有一个属性你改一下就可以了，,,BackgroundImage,,你可以浏览你想要的图片

private void mnuBackPic_Click(object sender,EventArgs e)
{
if(MessageBox.Show("是否更换背景图片？","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Question)==DialogResult.Yes)
{
OpenFileDialog of=new OpenFileDialog();

string filename=of.FileName;
this.BackgroundImage=System.Drawing.Image.FromFile(filename);
}
}

OpenFileDialog of=new OpenFileDialog();

if(of.ShowDialog() == DialogResult.OK)
{

string filename=of.FileName;

try
{
this.BackgroundImage = System.Drawing.Image.FromFile(filename);
}
catch(Exception ex)
{
string errormsg = ex.Message;
MessageBox.Show(errormsg);
}
}
这个才对