Queue.Count Property in C#

C# | Dictionary.Count Property

Last Updated : 01 Feb, 2019

This property is used to get the number of key/value pairs contained in the Dictionary. Syntax:

public int Count { get; }

Return Value : The number of key/value pairs contained in the Dictionary. Below are the programs to illustrate the use of above-discussed property: Example 1:

csharp

// C# code to count the number of 
// key/value pairs in  Dictionary
using System;
using System.Collections.Generic;

class GFG {

    // Driver code
    public static void Main()
    {

        // Create a new dictionary of
        // strings, with string keys.
        Dictionary<string, string> myDict = 
           new Dictionary<string, string>();

        // Adding key/value pairs in myDict
        myDict.Add("Australia", "Canberra");
        myDict.Add("Belgium", "Brussels");
        myDict.Add("Netherlands", "Amsterdam");
        myDict.Add("China", "Beijing");
        myDict.Add("Russia", "Moscow");
        myDict.Add("India", "New Delhi");

        // To get count of key/value
        // pairs in myDict
        Console.WriteLine("Total key/value pairs"+
              " in myDict are : " + myDict.Count);
    }
}

Output:

Total key/value pairs in myDict are : 6

Example 2:

csharp

// C# code to count the number of 
// key/value pairs in  Dictionary
using System;
using System.Collections.Generic;

class GFG {

    // Driver code
    public static void Main()
    {

        // Create a new dictionary of 
        // strings, with string keys.
        Dictionary<int, string> myDict = 
          new Dictionary<int, string>();

        // Adding key/value pairs in myDict
        myDict.Add(1, "C");
        myDict.Add(2, "C++");
        myDict.Add(3, "Java");
        myDict.Add(4, "Python");
        myDict.Add(5, "C#");
        myDict.Add(6, "HTML");

        // To get count of key/value pairs in myDict
        Console.WriteLine("Total key/value pairs"+
              " in myDict are : " + myDict.Count);
    }
}

Output:

Total key/value pairs in myDict are : 6

Note: Retrieving the value of this property is an O(1) operation. Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2.count?view=netframework-4.7.2#System_Collections_Generic_Dictionary_2_Count

Queue.Count Property in C#

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