C# | Removing all entries from the StringDictionary Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report StringDictionary.Clear method is used to remove all the entries from the StringDictionary. Syntax: public virtual void Clear (); Exception: This method will give the NotSupportedException if the StringDictionary is read-only. Example: CSHARP // C# code to remove all entries // from the StringDictionary using System; using System.Collections; using System.Collections.Specialized; class GFG { // Driver code public static void Main() { // Creating a StringDictionary named myDict StringDictionary myDict = new StringDictionary(); // Adding key and value into the StringDictionary myDict.Add("A", "Apple"); myDict.Add("B", "Banana"); myDict.Add("C", "Cat"); myDict.Add("D", "Dog"); myDict.Add("E", "Elephant"); myDict.Add("F", "Fish"); // Displaying the keys and values in StringDictionary Console.WriteLine("The number of key/value pairs are : " + myDict.Count); foreach(DictionaryEntry dic in myDict) { Console.WriteLine(dic.Key + " " + dic.Value); } // Removing all entries from the StringDictionary myDict.Clear(); // Displaying the keys and values in StringDictionary Console.WriteLine("The number of key/value pairs are : " + myDict.Count); foreach(DictionaryEntry dic in myDict) { Console.WriteLine(dic.Key + " " + dic.Value); } } } Output: The number of key/value pairs are : 6 b Banana c Cat a Apple f Fish d Dog e Elephant The number of key/value pairs are : 0 Note: This method is an O(n) operation, where n is Count. Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringdictionary.clear?view=netframework-4.7.2 Comment More infoAdvertise with us Next Article Must Do Coding Questions - Topic-wise S Sahil_Bansall Follow Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Specialized-StringDictionary CSharp-Specialized-Namespace +1 More Similar Reads Interview PreparationInterview Preparation For Software DevelopersMust Coding Questions - Company-wise Must Do Coding Questions - Topic-wiseCompany-wise Practice ProblemsCompany PreparationCompetitive ProgrammingSoftware Design-PatternsCompany-wise Interview ExperienceExperienced - Interview ExperiencesInternship - Interview ExperiencesPractice @GeeksforgeeksProblem of the DayTopic-wise PracticeDifficulty Level - SchoolDifficulty Level - BasicDifficulty Level - EasyDifficulty Level - MediumDifficulty Level - HardLeaderboard !!Explore More...Data StructuresArraysLinked ListStackQueueBinary TreeBinary Search TreeHeapHashingGraphAdvance Data StructuresMatrixStringAll Data StructuresAlgorithmsAnalysis of AlgorithmsSearching AlgorithmsSorting AlgorithmsPattern SearchingGeometric AlgorithmsMathematical AlgorithmsRandomized AlgorithmsGreedy AlgorithmsDynamic ProgrammingDivide & ConquerBacktrackingBranch & BoundAll AlgorithmsProgramming LanguagesCC++JavaPythonC#Go LangSQLPHPScalaPerlKotlinWeb TechnologiesHTMLCSSJavaScriptBootstrapTailwind CSSAngularJSReactJSjQueryNodeJSPHPWeb DesignWeb BrowserFile FormatsComputer Science SubjectsOperating SystemsDBMSComputer NetworkComputer Organization & ArchitectureTOCCompiler DesignDigital Elec. & Logic DesignSoftware EngineeringEngineering MathematicsData Science & MLComplete Data Science CourseData Science TutorialMachine Learning TutorialDeep Learning TutorialNLP TutorialMachine Learning ProjectsData Analysis TutorialTutorial LibraryPython TutorialDjango TutorialPandas TutorialKivy TutorialTkinter TutorialOpenCV TutorialSelenium TutorialGATE CSGATE CS NotesGate CornerPrevious Year GATE PapersLast Minute Notes (LMNs)Important Topic For GATE CSGATE CoursePrevious Year Paper: CS exams Like