private void UpdateTextBoxes()
        {
            if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
            {
                return;
            }

            Student student = (Student)comboBox1.SelectedItem;
            Assignment assignment = (Assignment)comboBox2.SelectedItem;


            List<CompletedAssignment> completedAssignment = dbManager.GetCompletedAssignments(assignment.AssignmentID, student.StudentID);


            textBox1.Text = completedAssignment.EarnedPoints.ToString();

            textBox2.Text = assignment.TotalPoints.ToString();
        }

    }
}

        private void UpdateTextBoxes()
        {
            if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
            {
                return;
            }

            Student student = (Student)comboBox1.SelectedItem;
            Assignment assignment = (Assignment)comboBox2.SelectedItem;


            List<CompletedAssignment> completedAssignment = dbManager.GetCompletedAssignments(assignment.AssignmentID, student.StudentID);


            textBox1.Text = completedAssignment.EarnedPoints.ToString();

            textBox2.Text = assignment.TotalPoints.ToString();
        }

    }
}

        private void UpdateTextBoxes()
        {
            if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
            {
                return;
            }

            Student student = (Student)comboBox1.SelectedItem;
            Assignment assignment = (Assignment)comboBox2.SelectedItem;

            string completedAssignment = dbManager.GetCompletedAssignments(assignment.AssignmentID, student.StudentID).ToString();

            textBox1.Text = completedAssignment;
            textBox2.Text = assignment.TotalPoints.ToString();
        }

        private void UpdateTextBoxes()
        {
            if (comboBox1.SelectedItem == null || comboBox2.SelectedItem == null)
            {
                return;
            }

            Student student = (Student)comboBox1.SelectedItem;
            Assignment assignment = (Assignment)comboBox2.SelectedItem;

            string completedAssignment = dbManager.GetCompletedAssignments(assignment.AssignmentID, student.StudentID).ToString();

            textBox1.Text = completedAssignment;
            textBox2.Text = assignment.TotalPoints.ToString();
        }