Given a list, and we have to count its total number of elements using List.Count property.

给定一个列表，我们必须使用List.Count属性计算其元素总数 。

C＃清单 (C# List)

A list is used to represent the list of the objects, it is represented as List<T>, where T is the type of the list objects/elements.

列表用于表示对象的列表，它表示为List <T> ，其中T是列表对象/元素的类型。

A list is a class which comes under System.Collections.Generic package, so we have to include it first.

列表是System.Collections.Generic包下的一个类，因此我们必须首先包含它。

List.Count属性 (List.Count property)

Count is a property of List class; it returns the total number of elements of a List.

Count是List类的属性； 它返回List的元素总数。

Syntax:

句法：

    List_name.Count;

Here, List_name is the name of input/source list whose elements to be counted.

在此， List_name是要计算其元素的输入/源列表的名称。

Example:

例：

    Input:
//an integer list
List<int> int_list = new List<int> { 10, 20, 30, 40, 50, 60, 70 };
//a string list 
List<string> str_list = new List<string>{
"Manju", "Amit", "Abhi", "Radib", "Prem"
};
Function call:
int_list.Count;
str_list.Count;
Output:
7
5

C＃程序计算列表中元素的总数 (C# program to count the total number of elements of a List)

using System;
using System.Text;
using System.Collections.Generic;
namespace Test
{
class Program
{
static void Main(string[] args)
{
//an integer list
List<int> int_list = new List<int> { 10, 20, 30, 40, 50, 60, 70 };
//a string list 
List<string> str_list = new List<string>{
"Manju", "Amit", "Abhi", "Radib", "Prem"
};
//printing total number of elements
Console.WriteLine("Total elements in int_list is: " + int_list.Count);
Console.WriteLine("Total elements in str_list is: " + str_list.Count);
//hit ENTER to exit
Console.ReadLine();
}
}
}

Output

输出量

Total elements in int_list is: 7
Total elements in str_list is: 5

翻译自: https://www.includehelp.com/dot-net/gets-the-number-of-elements-contained-in-the-list-t-in-c-sharp.aspx