编写C#程序，计算去除最大值和最小值之后的平均值

有10位评委对跳水运动员做评分，编写C#程序，计算去除最大得分和最小得分之后的平均得分 作为运动员的跳水成绩。

interface IMark

using System.Collections.Generic;

namespace ConsoleApp1
{
/// <summary>
/// 评分接口
/// </summary>
interface IMark
    {

        Mark GetMaxScore(List<Mark> list_Marks);

        Mark GetMinScore(List<Mark> list_Marks);

/// <summary>
/// 获取所有评分
/// </summary>
/// <returns></returns>
        List<Mark> GetAllMarks(int athleteId);

/// <summary>
/// 获取除最大得分和最小得分之后的平均得分
/// </summary>
/// <returns></returns>
float GetAvgScoreExceptFirstAndLast();
    }
}

class Mark

namespace ConsoleApp1
{
/// <summary>
/// 评分实体
/// </summary>
public class Mark
    {
public int Id;
public int JuryId;
public int AthleteId;
public float Score;
    }
}

class MarkService

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

namespace ConsoleApp1
{
/// <summary>
/// 实现评分接口
/// </summary>
public class MarkService : IMark
    {  
public MarkService()
        { 
        }

/// <summary>
/// 获取所有评分
/// </summary>
/// <param name="athleteId"></param>
/// <returns></returns>
public List<Mark> GetAllMarks(int athleteId)
        {
            List<Mark> list = new List<Mark>();
for (int i = 1; i < 11; i++) {
                list.Add(new Mark()
                {
                    Id = i,
                    JuryId = i,
                    AthleteId = 1,
                    Score = i,                    
                });
            }
return list.Where(x=>x.AthleteId ==athleteId).ToList();
        } 

/// <summary>
/// 获取除最小分数、最大分数之外的平均得分
/// </summary>
/// <returns></returns>
public float GetAvgScoreExceptFirstAndLast()
        {
            List<Mark> List_Marks = this.GetAllMarks(1);
return List_Marks.Where(
                x => x.Id != this.GetMaxScore(List_Marks).Id &&
                    x.Id != this.GetMinScore(List_Marks).Id).Average(y=>y.Score); 
        }

/// <summary>
/// 获取最大得分
/// </summary>
/// <param name="list_Marks"></param>
/// <returns></returns>
public Mark GetMaxScore(List<Mark> list_Marks)
        {
float maxScore = list_Marks.Max<Mark>(x => x.Score);
return list_Marks.Where(x => x.Score == maxScore).FirstOrDefault();
        }

/// <summary>
/// 获取最小得分
/// </summary>
/// <param name="list_Marks"></param>
/// <returns></returns>
public Mark GetMinScore(List<Mark> list_Marks)
        {
float minScore = list_Marks.Min<Mark>(x => x.Score);
return list_Marks.Where(x => x.Score == minScore).FirstOrDefault(); 
        }


    }
}

 

class Program

using System;
using System.Text; 
namespace ConsoleApp1
{
class Program
    {
static void Main(string[] args)
        {
            IMark t = new Test();
            Console.WriteLine(t.GetAvgScoreExceptFirstAndLast());

            Console.Read();

        }
    }
}