此属性用于获取队列中包含的元素数。检索此属性的值是一个O(1)操作，它位于System.Collections命名空间下。
句法：
public virtual int Count { get; }属性值：此属性返回队列中包含的元素数。
下面的程序说明了上面讨论的属性的用法：
范例1：
// C# code to illustrate the
// Queue.Count Property
using System;
using System.Collections;
class GFG {
// Driver code
public static void Main()
{
// Creating a Queue
Queue myQueue = new Queue();
// Displaying the count of elements
// contained in the Queue
Console.Write("Total number of elements"+
" in the Queue are : ");
// The function should return 0
// as the Queue is empty and it
// doesn't contain any element
Console.WriteLine(myQueue.Count);
}
}
输出：
Total number of elements in the Queue are : 0
范例2：
// C# code to illustrate the
// Queue.Count Property
using System;
using System.Collections;
class GFG {
// Driver code
public static void Main()
{
// Creating a Queue
Queue myQueue = new Queue();
// Inserting the elements into the Queue
myQueue.Enqueue("C");
myQueue.Enqueue("C++");
myQueue.Enqueue("Java");
myQueue.Enqueue("C#");
myQueue.Enqueue("HTML");
myQueue.Enqueue("CSS");
// Displaying the count of elements
// contained in the Queue
Console.Write("Total number of elements "+
"in the Queue are : ");
Console.WriteLine(myQueue.Count);
}
}
输出：
Total number of elements in the Queue are : 6
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.queue.count?view=netframework-4.7.2