在使用Linq选择多个中添加条件

// 假设有一个名为numbers的整数列表
List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };

// 使用Where方法选择大于3的元素
var result = numbers.Where(num => num > 3);

// 输出结果
foreach (var num in result)
{
    Console.WriteLine(num);
}

// 输出：4 5

// 假设有一个名为persons的Person对象列表
List<Person> persons = new List<Person>
{
    new Person { Name = "Alice", Age = 25, Gender = "Female" },
    new Person { Name = "Bob", Age = 30, Gender = "Male" },
    new Person { Name = "Charlie", Age = 35, Gender = "Male" },
    new Person { Name = "David", Age = 40, Gender = "Male" },
    new Person { Name = "Eve", Age = 45, Gender = "Female" }
};

// 使用多个Where方法选择符合条件的人员
var result = persons.Where(p => p.Age > 30).Where(p => p.Gender == "Male");

// 输出结果
foreach (var person in result)
{
    Console.WriteLine(person.Name);
}

// 输出：Charlie David