using (var db = new AmozeshEntities())
{
//var course = db.course
var objcourse = new course
{
ccode = txtccode.Text,
cname = txtname.Text,
cunit = int.Parse(txtunit.Text),
cdate = Convert.ToDateTime(mskdate.Text),
cday = txtday.Text,
creshte = txtreshte.Text,
cnoe = cmbnoe.Text,
};
db.AddTocourses(objcourse);
db.SaveChanges();
dataGridView1.DataSource = db.courses;
}