/// <summary>
/// This method is used to update the user.
/// </summary>
public void UpdateGradeInMemory(Grade gradeUpdate)
{
InMemoryDatabaseSingleton.DatabaseInstance.Update(gradeUpdate);
}
/// <summary>
/// This method is used to update the grade name.
/// </summary>
/// <param name="score">This is the grade name.</param>
public void UpdateGradeName(string score)
{
Grade Grade = InMemoryDatabaseSingleton.DatabaseInstance.SelectTopOne <Grade>(x => x.GradeScore == GradeScore);
Grade.GradeScore = score;
}