LINQ |如何找到给定序列的最大值？

在LINQ中，可以使用Max()函数找到给定序列的最大元素。此方法提供给定值集中的最大元素。它在C＃中不支持查询语法，但是在VB.NET中支持。它在C＃中的Enumerable和Queryable类中均可用。如果集合中存在的所有元素均为null，则返回null。它返回任何类型的数据类型，这意味着您还可以将Max与自定义类型的集合一起使用(不包含数字值)，但是为此，您必须实现IComparable接口。它可以与可为空，不可为空的十进制，双精度，浮点数，整数等值一起使用。

范例1：

// C# program to find maximum 
// value from the given array
using System;
using System.Linq;
  
class GFG {
  
    // Main Method
    static public void Main()
    {
  
        // Data source
        int[] sequence = {20, 45, 50, 79, 90,
                       79, 89, 100, 567, 29};
  
        // Display the sequence
        Console.WriteLine("The sequence is:");
        foreach(int s in sequence)
        {
            Console.WriteLine(s);
        }
  
        // Finding the maximum element
        // from the given sequence
        // Using Max function
        int result = sequence.Max();
        Console.WriteLine("Maximum Value: {0}", result);
    }
}

输出：

The sequence is:
20
45
50
79
90
79
89
100
567
29
Maximum Value: 567

范例2：

// C# program to find the Maximum
// salary of the employee
using System;
using System.Linq;
using System.Collections.Generic;
  
// Employee details
public class Employee {
  
    public int emp_id
    {
        get;
        set;
    }
    public string emp_name
    {
        get;
        set;
    }
    public string emp_gender
    {
        get;
        set;
    }
    public string emp_hire_date
    {
        get;
        set;
    }
    public int emp_salary
    {
        get;
        set;
    }
}
  
class GFG {
  
    // Main method
    static public void Main()
    {
        List emp = new List() {
            new Employee() { emp_id = 209, emp_name = "Anjita", emp_gender = "Female", emp_hire_date = "12/3/2017", emp_salary = 20000 },
                new Employee() { emp_id = 210, emp_name = "Soniya", emp_gender = "Female", emp_hire_date = "22/4/2018", emp_salary = 30000 },
                new Employee() { emp_id = 211, emp_name = "Rohit", emp_gender = "Male", emp_hire_date = "3/5/2016", emp_salary = 40000 },
                new Employee() { emp_id = 212, emp_name = "Supriya", emp_gender = "Female", emp_hire_date = "4/8/2017", emp_salary = 40000 },
                new Employee() { emp_id = 213, emp_name = "Anil", emp_gender = "Male", emp_hire_date = "12/1/2016", emp_salary = 40000 },
                new Employee() { emp_id = 214, emp_name = "Anju", emp_gender = "Female", emp_hire_date = "17/6/2015", emp_salary = 50000 },
        };
  
        // Find the Maximum salary of the 
        // employee Using Max() method
        var res = emp.Max(a => a.emp_salary);
        Console.WriteLine("Maximum Salary of the Employee: {0}", res);
    }
}

输出：

Maximum Salary of the Employee: 50000