C# | SortedDictionary.Remove() Method Last Updated : 01 Feb, 2019 Comments Improve Suggest changes Like Article Like Report This method is used to remove the value with the specified key from the SortedDictionary<TKey, TValue>. Syntax: public bool Remove (TKey key); Return Value: This method returns true if the element is successfully found and removed; otherwise it returns false. This method returns false if key is not found in the SortedDictionary. Exception: This method will give ArgumentNullException if the key is null. Below are the programs to illustrate the use of the above-discussed method: Example 1: csharp // C# code to remove the entry with // the specified key from the // SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new dictionary of // strings, with string keys. SortedDictionary<string, string> myDict = new SortedDictionary<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); // Remove the entry with the specified // key from the Dictionary myDict.Remove("Russia"); Console.WriteLine("After remove operation"); // 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 After remove operation Total key/value pairs in myDict are : 5 Example 2: csharp // C# code to remove the entry with // the specified key from the // SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new SortedDictionary // of ints, with int keys. SortedDictionary<int, int> myDict = new SortedDictionary<int, int>(); // Adding key/value pairs in myDict myDict.Add(9, 8); myDict.Add(3, 4); myDict.Add(4, 7); myDict.Add(1, 7); // To get count of key/value pairs in myDict Console.WriteLine("Total key/value pairs " + "in myDict are : " + myDict.Count); // Remove the entry with the specified // key from the Dictionary myDict.Remove(9); Console.WriteLine("After remove operation"); // 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 : 4 After remove operation Total key/value pairs in myDict are : 3 Reference: https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sorteddictionary-2.remove?view=netframework-4.7.2 Comment More infoAdvertise with us Next Article C# | SortedDictionary.Remove() Method R rupesh_rao Follow Improve Article Tags : C# CSharp-method CSharp-Generic-Namespace CSharp SortedDictionary Class Similar Reads C# | SortedDictionary.Add() Method This is used to add a specified key and value to the sorted dictionary. The elements are sorted according to TKey. Syntax: public void Add (TKey key, TValue value); Parameters: key: It is the key of the element to add. value: It is the value of the element to add. The value can be null for reference 3 min read C# | SortedDictionary.Clear() Method This method is used to remove all key/value pairs from the SortedDictionary<TKey, TValue>. Syntax: public void Clear (); Below are the programs to illustrate the use of the above-discussed method: Example 1: csharp // C# code to remove all pairs // from SortedDictionary using System; using Sys 2 min read C# | SortedDictionary.Item[] Property This property is used to get or set the value associated with the specified key. Syntax: public TValue this[TKey key] { get; set; } Here, key is the Key of the value to get or set. Property Value: The value associated with the specified key. If the specified key is not found, a get operation throws 2 min read C# | SortedDictionary.Keys Property This property is used to get a collection containing the keys in the SortedDictionary. Syntax: public System.Collections.Generic.SortedDictionary<TKey,TValue>.KeyCollection Keys { get; } Return Value : It returns a collection containing the keys in the SortedDictionary. Below are the programs 2 min read C# | SortedDictionary.Count Property This property is used to get the number of key/value pairs contained in the SortedDictionary<TKey, TValue>. Syntax: public int Count { get; } Return Value : It returns the number of key/value pairs contained in the SortedDictionary. Below are the programs to illustrate the use of above-discuss 2 min read Like