Professional .NET 2.0 Generics

4.3. Fields

The fields of a generic class follow all the same syntax rules that are applied to non-generic fields. The primary incremental change here is the ability to reference type parameters in the declaration of your class's fields. Here's an example where this is applied:

[VB code]
Public Class MyType(Of T, U)
    Private _myFirstDataMember As T
    Private _mySecondDataMember As U

    Public Sub New(ByVal val1 As T, ByVal val2 As U)
        Me._myFirstDataMember = val1
        Me._mySecondDataMember = val2
    End Sub

    Public Function GetFirstDataMember() As T
        Return Me._myFirstDataMember
    End Function

    Public Function GetSecondDataMember() As U
        Return Me._mySecondDataMember

End Function
End Class

Public Class MyApp
    Shared Sub Main()
        Dim testType As New MyType(Of String, String)("val1", "Val2")
        Console.WriteLine(testType.GetFirstDataMember())
        Console.WriteLine(testType.GetSecondDataMember())
    End Sub
End Class

[C# code]
using System;

class MyType<T, U> {
    private T _myFirstDataMember;
    private U _mySecondDataMember;

    public MyType(T val1, U val2) {
        this._myFirstDataMember = val1;
        this._mySecondDataMember = val2;
    }

    public T GetFirstDataMember() {
        return this._myFirstDataMember;
    }

    public U GetSecondDataMember() {
        return this._mySecondDataMember;
    }
}

class MyApp {
    static void main(String[] args) {
        MyType<string, string> testType =
                        new MyType<string, string>("Val1", "Val2");
        Console.WriteLine(testType.GetFirstDataMember());
        Console.WriteLine(testType.GetSecondDataMember());
    }
}

As you can see, the generic class ...