using System;

public class CatalogManager<T1, T2, T3> where T1 : ICatalogDataEntryForm<DataEntryControl>, new()

                                           where T2 : ICatalogDataGridForm<DataGridControl>, new()

                                           where T3 : CatalogBusinessObject

    {

        public CatalogManager()

        {

        }

​

    }

​

    public class DataEntryControl

    {

    }

​

    public class DataGridControl

    {

    }

​

    public class CatalogBusinessObject

    {

    }

​

​

    public class BankDataEntryControl : DataEntryControl

    {

    }

​

    public class BankDataGridControl : DataGridControl

    {

    }

​

​

    public interface ICatalogDataEntryForm<out T> { }

​

    public interface ICatalogDataGridForm<out T>

    { }

​

    public class CatalogDataEntryForm<T> : ICatalogDataEntryForm<T>

    { }

    public class CatalogDataGridForm<T> : ICatalogDataGridForm<T>

    {}

​

    public class BankDataGridForm : CatalogDataGridForm<BankDataGridControl>

    { }

    public class BankDataEntryForm : CatalogDataEntryForm<BankDataEntryControl>

    {

    }

​

    public class BankManager : CatalogManager<BankDataEntryForm, BankDataGridForm,CatalogBusinessObject>

    {

        public BankManager()

        {

​

        }

    }               

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}