LINQ相等

比较两个句子(枚举)，并确定它们是精确匹配与否。

SequenceEqual例子 - Enumerable.SequenceEqual方法

C#

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

namespace Operators
{
  class SequenceEqual
  {
     static void Main(string[] args)
     {
        Pet barley = new Pet() { Name = "Barley", Age = 4 };
        Pet boots = new Pet() { Name = "Boots", Age = 1 };
        Pet whiskers = new Pet() { Name = "Whiskers", Age = 6 };

        List<Pet> pets1 = new List<Pet>() { barley, boots };
        List<Pet> pets2 = new List<Pet>() { barley, boots };
        List<Pet> pets3 = new List<Pet>() { barley, boots, whiskers };

        bool equal = pets1.SequenceEqual(pets2);
        bool equal3 = pets1.SequenceEqual(pets3);

        Console.WriteLine("The lists pets1 and pets2 {0} equal.", equal ? "are" :"are not");
        Console.WriteLine("The lists pets1 and pets3 {0} equal.", equal3 ? "are" :"are not");

        Console.WriteLine("\nPress any key to continue.");
        Console.ReadKey();
     }

     class Pet
     {
        public string Name { get; set; }
        public int Age { get; set; }
     }
  }
}

VB

Module Module1
  Sub Main()

     Dim barley As New Pet With {.Name = "Barley", .Age = 4}
     Dim boots As New Pet With {.Name = "Boots", .Age = 1}
     Dim whiskers As New Pet With {.Name = "Whiskers", .Age = 6}

     Dim pets1 As New System.Collections.Generic.List(Of Pet)(New Pet() {barley, boots})
     Dim pets2 As New System.Collections.Generic.List(Of Pet)(New Pet() {barley, boots})
     Dim pets3 As New System.Collections.Generic.List(Of Pet)(New Pet() {barley, boots, whiskers})

     Dim equal As Boolean = pets1.SequenceEqual(pets2)
     Dim equal3 As Boolean = pets1.SequenceEqual(pets3)

     Console.WriteLine("The lists pets1 and pets2 {0} equal.", IIf(equal, "are", "are not"))
     Console.WriteLine("The lists pets1 and pets3 {0} equal.", IIf(equal3, "are", "are not"))

     Console.WriteLine(vbLf & "Press any key to continue.")
     Console.ReadKey()
  End Sub

  Class Pet
     Public Property Name As String
     Public Property Age As Integer
  End Class
End Module

当C＃或VB的上述代码被编译和执行时，它产生了以下结果：

The lists pets1 and pets2 are equal.
The lists pets1 and pets3 are not equal.

Press any key to continue.