LINQ之基礎-Lambda運算式

以下為C#之程式(主控台應用程式專案)：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Program pg = new Program();
            helloDelegate myHelloDelegate = new helloDelegate(pg.ReturnMessage);
            string message = myHelloDelegate("Kangting");
            Console.WriteLine(message);
            Console.ReadKey();
        }

        public string ReturnMessage(string pName)
        {
            string message = "Hello,";
            message += pName;
            return message;
        }

        public delegate string helloDelegate(string pName);
    }
}

我將之改寫成VB2008之程式碼(主控台應用程式專案)：

Module Module1

    Public Delegate Function helloDelegate(ByVal pName As String) As String

    Public Function ReturnMessage(ByVal pName As String) As String
        Dim message As String = "Hello,"
        message &= pName
        Return message
    End Function

    Sub Main()
        Dim myHelloDelegate As New helloDelegate(AddressOf ReturnMessage)
        Dim message As String = myHelloDelegate.Invoke("Kangting")
        Console.WriteLine(message)
        Console.ReadKey()
    End Sub

End Module

再進一步將之改寫為：

Module Module1

    Public Delegate Function helloDelegate(ByVal pName As String) As String

    Public Function ReturnMessage(ByVal pName As String) As String
        Dim message As String = "Hello,"
        message &= pName
        Return message
    End Function

    Sub Main()
        'Dim myHelloDelegate As New helloDelegate(AddressOf ReturnMessage)
        'Dim message As String = myHelloDelegate.Invoke("Kangting")
        'Console.WriteLine(message)
        Dim myHelloDelegate As helloDelegate = Function(pName As String) "Hello," & pName
        Console.WriteLine(myHelloDelegate("Kangting"))
        Console.ReadKey()
    End Sub

End Module