**SequenceEqual **
以下代碼示例演示如何使用SequenceEqual (IEnumerable ,IEnumerable ) 來確定兩個序列是否相等。在前兩個示例中,該方法確定比較的序列是否包含對相同對象的引用。
在這個例子中,序列是相等的。
class Pet
{
public string Name { get; set; }
public int Age { get; set; }
}
public static void SequenceEqualEx1()
{
Pet pet1 = new Pet { Name = "Turbo", Age = 2 };
Pet pet2 = new Pet { Name = "Peanut", Age = 8 };
// Create two lists of pets.
List<Pet> pets1 = new List<Pet> { pet1, pet2 };
List<Pet> pets2 = new List<Pet> { pet1, pet2 };
bool equal = pets1.SequenceEqual(pets2);
Console.WriteLine(
"The lists {0} equal.",
equal ? "are" : "are not");
}
/*
This code produces the following output:
The lists are equal.
*/
以下代碼示例比較了兩個不相等的序列。請注意,序列包含相同的數據,但由於它們包含的對象具有不同的引用,因此序列不被視爲相等。
class Pet
{
public string Name { get; set; }
public int Age { get; set; }
}
public static void SequenceEqualEx2()
{
Pet pet1 = new Pet() { Name = "Turbo", Age = 2 };
Pet pet2 = new Pet() { Name = "Peanut", Age = 8 };
// Create two lists of pets.
List<Pet> pets1 = new List<Pet> { pet1, pet2 };
List<Pet> pets2 =
new List<Pet> { new Pet { Name = "Turbo", Age = 2 },
new Pet { Name = "Peanut", Age = 8 } };
bool equal = pets1.SequenceEqual(pets2);
Console.WriteLine("The lists {0} equal.", equal ? "are" : "are not");
}
/*
This code produces the following output:
The lists are not equal.
*/
本文摘自官方案例。