อยากทราบการ insert update delete method โดยเขียนเป็น Class อ่ะครับ แนะนำทีครับ

public interface IMyClass
{
void Insert();
void Update();
void Delete();
.
.
หรือ
bool Insert();
bool Update();
bool Delete();
}

namespace MyProject
{
public class Employee : IMyClass // เรียกใช้
{
#region IMyClass Member
[void] / [bool] Insert()
{
throw new Exception("The method or operation is not implemented.");
}

[void] / [bool] Update()
{
throw new Exception("The method or operation is not implemented.");
}

[void] / [bool] Delete()
{
throw new Exception("The method or operation is not implemented.");
}
#endregion
}
}

public partial class Form1 : Form , IMyClass // เรียกใช้งาน
{
#region IMyClass Member
[void] / [bool] Insert()
{
throw new Exception("The method or operation is not implemented.");
}

[void] / [bool] Update()
{
throw new Exception("The method or operation is not implemented.");
}

[void] / [bool] Delete()
{
throw new Exception("The method or operation is not implemented.");
}
#endregion
}