private void StudentData_RowHeaderMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e) { int StudentId = Convert.ToInt32(StudentData.CurrentRow.Cells[0].Value); tblStudent tbs = db.tblStudents.Where(a => a.StudenId == StudentId).FirstOrDefault(); ManageStudent ms = new ManageStudent(); ms.btnSave.Enabled = false; ms.txtFullname.Text = tbs.Fullname.ToString(); if (tbs.Gender.ToString() == "Male") { ms.rbdMale.Checked = true; } else { ms.rbdFemale.Checked = true; } ms.txtRollNo.Text = tbs.RollNo; ms.txtPhoneNo.Text = tbs.PhoneNo; ms.txtEmail.Text = tbs.Email; this.DialogResult = DialogResult.OK; }