C#怎么从List集合中删除某个元素？

1.首先在该命名空间下创建一个实体，和在Main方法下List集合，为后续做准备：

/// <summary>
/// 实体
/// </summary>
public class Student { 
   public int ID { get; set; }
   public string Name { get; set; }
   public int Age { get; set; }
   public string Location { get; set; }
   public string Hobby { get; set; }
}

//创建一个List集合
List<Student> Students = new List<Student>();
//添加数据
Students.Add(new Student()
{
                ID=1,
                Name="猪猪侠",
                Age=12,
                Location="长沙",
                Hobby = "打怪"
            });
            Students.Add(new Student()
            {
                ID = 2,
                Name = "猫咪",
                Age = 15,
                Location = "株洲",
                Hobby = "打球"
            });
            Students.Add(new Student()
            {
                ID = 3,
                Name = "大象",
                Age = 34,
                Location = "邵阳",
                Hobby = "抽血"
            });
            Students.Add(new Student()
            {
                ID = 4,
                Name = "猴子",
                Age = 32,
                Location = "醴陵",
                Hobby = "吃香蕉"
            });
            Students.Add(new Student()
            {
                ID = 5,
                Name = "鸭子",
                Age = 30,
                Location = "山西",
                Hobby = "吃蚯蚓"
            });

 

一、【错误演示】：有很多人会使用遍历，但是顺序遍历会导致删除不完整

 for (int i = 0; i <= Students.Count; i++) {
     Students.Remove(Students[i]);
     //Students.RemoveAt(i);
     //Students.RemoveRange(i, 1);
 }
foreach (var item in Students) {
     Console.WriteLine($"ID：{item.ID}--Name：{item.Name}--Age：{item.Age}--Location：{item.Location}--Hpbby：{item.Hobby}");
}

//没有按照预想的删除完成

 

二、【正确演示】：使用倒序遍历

 //【正确演示】
for (int i = Students.Count-1; i >= 0; i--) {
      Students.Remove(Students[i]);
}
foreach (var item in Students)
{
      Console.WriteLine($"ID：{item.ID}--Name：{item.Name}--Age：{item.Age}--Location：{item.Location}--Hpbby：{item.Hobby}");
}

//能看到完全删除了