C# - SortedList.Contains() Method with Example

In this tutorial, we will learn about the C# SortedList.Contains() method with its definition, usage, syntax, and example. By Nidhi Last updated : March 31, 2023

SortedList.Contains() Method

The SortedList.Contains() is used to check whether a SortedList object contains a specific key. The Contains() method is similar to ContainsKey() method but it is inherited from the base class.


bool SortedList.Contains(object key);


  • key: The key to locate in the SortedList object.

Return Value

It returns a boolean value, if the key is found within SortedList then it returns true, otherwise it returns false.


  • System.ArgumentNullException
  • System.InvalidOperationException

C# Example of SortedList.Contains() Method

The source code to check whether a SortedList object contains a specific key is given below. The given program is compiled and executed successfully.

using System;
using System.Collections;

class SortedListEx {
  //Entry point of Program
  static public void Main() {
    //Creation of SortedList object
    SortedList list = new SortedList();
    bool ret = false;

    //Add elements to SortedList 
    list.Add(101, "India    ");
    list.Add(105, "America  ");
    list.Add(102, "Australia");
    list.Add(103, "Africa   ");
    list.Add(104, "Canada   ");

    ret = list.Contains(102);
    if (ret == true)
      Console.WriteLine("102 is contained in SortedList");
      Console.WriteLine("102 is not contained in SortedList");

    ret = list.Contains(108);
    if (ret == true)
      Console.WriteLine("108 is contained in SortedList");
      Console.WriteLine("108 is not contained in SortedList");


102 is contained in SortedList
108 is not contained in SortedList
Press any key to continue . . .

C# SortedList Class Programs »

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