C# | Removing all entries from the StringDictionary Last Updated : 11 Jul, 2025 Summarize Comments Improve Suggest changes Share 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 How to create a StringDictionary in C# S Sahil_Bansall Follow Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Specialized-StringDictionary CSharp-Specialized-Namespace +1 More Similar Reads C# | Remove all entries from the ListDictionary ListDictionary.Clear method is used to remove the all entries from the ListDictionary. Syntax: public void Clear (); Below given are some examples to understand the implementation in a better way: Example 1: CSHARP // C# code to remove all entries // from the ListDictionary using System; using Syste 3 min read C# | Remove all entries from the ListDictionary ListDictionary.Clear method is used to remove the all entries from the ListDictionary. Syntax: public void Clear (); Below given are some examples to understand the implementation in a better way: Example 1: CSHARP // C# code to remove all entries // from the ListDictionary using System; using Syste 3 min read C# | Remove entry with specified key from the StringDictionary StringDictionary.Remove(String) method is used to remove the entry with the specified key from the string dictionary. Syntax: public virtual void Remove (string key); Here, key is the key of the entry to remove. Exceptions: ArgumentNullException: If the key is null. NotSupportedException: If the Str 3 min read C# | Remove entry with specified key from the StringDictionary StringDictionary.Remove(String) method is used to remove the entry with the specified key from the string dictionary. Syntax: public virtual void Remove (string key); Here, key is the key of the entry to remove. Exceptions: ArgumentNullException: If the key is null. NotSupportedException: If the Str 3 min read How to create a StringDictionary in C# StringDictionary() constructor is used to initialize a new instance of the StringDictionary class which will be empty and will have the default initial capacity. StringDictionary is a specialized collection. This class comes under the System.Collections.Specialized namespace. It only allows string k 2 min read How to create a StringDictionary in C# StringDictionary() constructor is used to initialize a new instance of the StringDictionary class which will be empty and will have the default initial capacity. StringDictionary is a specialized collection. This class comes under the System.Collections.Specialized namespace. It only allows string k 2 min read Like