private void btnChooseAvatar_Click(object sender, EventArgs e)
{
if (DialogImage.ShowDialog() == DialogResult.OK)
{
AddStudentBackground.RunWorkerAsync();
}
}
private void AddStudentBackground_DoWork(object sender, DoWorkEventArgs e)
{
string _studentImagePath;
_studentImagePath = DialogImage.FileName;
studentinfor.Avatar = Image.FromFile(_studentImagePath);
AddStudentBackground.ReportProgress(0, _studentImagePath);
}