private void btnUpdate_Click(object sender, EventArgs e)
 {
     if (string.IsNullOrWhiteSpace(txtName.Text))
     {
         MessageBox.Show("Name is required");
     }
     else
     {
         var model = new DbFirst.Student()
         {
             Student1 = txtName.Text, Id = Convert.ToInt32(lblStudentId.Text), Email = txtEmail.Text, DOB = dateTimeDOB.Value
         };
         var res = students.Update(model);
         if (res)
         {
             MessageBox.Show("Record updated");
             LoadData();
             txtName.Text      = "";
             lblStudentId.Text = "";
             txtEmail.Text     = "";
             dateTimeDOB.Value = DateTime.Now;
             btnCreate.Visible = true;
             btnUpdate.Visible = false;
             btnDelete.Visible = false;
         }
         else
         {
             MessageBox.Show("Some error occured");
         }
     }
 }
 private void btnCreate_Click(object sender, EventArgs e)
 {
     if (string.IsNullOrWhiteSpace(txtName.Text))
     {
         MessageBox.Show("Name is required");
     }
     else
     {
         var model = new DbFirst.Student()
         {
             Student1 = txtName.Text, Email = txtEmail.Text, DOB = dateTimeDOB.Value
         };
         var res = students.Create(model);
         if (res)
         {
             MessageBox.Show("Record inserted");
             LoadData();
             txtName.Text  = "";
             txtEmail.Text = "";
         }
         else
         {
             MessageBox.Show("Some error occured");
         }
     }
 }