C#数组包含部分

int[] arr = new int[] { 1, 2, 3, 4, 5 };
int target = 3;
int index = Array.IndexOf(arr, target);
if (index != -1)
{
    Console.WriteLine("数组包含目标元素，索引为：" + index);
}
else
{
    Console.WriteLine("数组不包含目标元素");
}

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

Person[] persons = new Person[]
{
    new Person { Name = "Tom", Age = 20 },
    new Person { Name = "Jerry", Age = 22 },
    new Person { Name = "Alice", Age = 18 }
};

Person targetPerson = new Person { Name = "Jerry", Age = 22 };
int index = Array.FindIndex(persons, p => p.Name == targetPerson.Name && p.Age == targetPerson.Age);
if (index != -1)
{
    Console.WriteLine("数组包含目标对象，索引为：" + index);
}
else
{
    Console.WriteLine("数组不包含目标对象");
}