C# | Check if the specified string is in the StringCollection Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report StringCollection class is a new addition to the .NET Framework class library that represents a collection of strings. StringCollection class is defined in the System.Collections.Specialized namespace. StringCollection.Contains(String) method is used to check whether the specified string is in the StringCollection or not. Syntax: public bool Contains (string value); Here, value is the string to locate in the StringCollection. The value can be null. Return Value: This method returns true if value is found in the StringCollection, otherwise it returns false. Note: The Contains method can confirm the existence of a string before performing further operations. This method performs a linear search, therefore, this method is an O(n) operation, where n is Count. Below programs illustrate the use of StringCollection.Contains(String) Method: Example 1 : CSHARP // C# code to check if the specified // string is in the StringCollection using System; using System.Collections; using System.Collections.Specialized; class GFG { // Driver code public static void Main() { // creating a StringCollection named myCol StringCollection myCol = new StringCollection(); // creating a string array named myArr String[] myArr = new String[] { "A", "B", "C", "D", "E" }; // Copying the elements of a string // array to the end of the StringCollection. myCol.AddRange(myArr); // checking if StringCollection // Contains "A" Console.WriteLine(myCol.Contains("A")); } } Output: True Example 2: CSHARP // C# code to check if the specified // string is in the StringCollection using System; using System.Collections; using System.Collections.Specialized; class GFG { // Driver code public static void Main() { // creating a StringCollection named myCol StringCollection myCol = new StringCollection(); // creating a string array named myArr String[] myArr = new String[] { "2", "3", "4", "5", "6" }; // Copying the elements of a string // array to the end of the StringCollection. myCol.AddRange(myArr); // checking if StringCollection // Contains "8" Console.WriteLine(myCol.Contains("8")); } } Output: False Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringcollection.contains?view=netframework-4.7.2 Comment More info S Sahil_Bansall Follow Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Specialized-Namespace CSharp-Specialized-StringCollection +1 More Explore IntroductionC# Tutorial 4 min read Introduction to .NET Framework 6 min read C# .NET Framework (Basic Architecture and Component Stack) 6 min read C# Hello World 2 min read Common Language Runtime (CLR) in C# 4 min read FundamentalsC# Identifiers 2 min read Data Types in C# 6 min read C# Variables 4 min read C# Literals 5 min read Operators in C# 7 min read C# Keywords 5 min read Control StatementsC# Decision Making (if, if-else, if-else-if ladder, nested if, switch, nested switch) 5 min read C# Switch Statement 4 min read Loops in C# 4 min read C# Jump Statements (Break, Continue, Goto, Return and Throw) 4 min read OOP ConceptsClass and Objects in C# 4 min read Constructors in C# 5 min read C# Inheritance 3 min read Encapsulation in C# 2 min read C# Abstraction 4 min read MethodsMethods in C# 4 min read Method Overloading in C# 4 min read C# | Method Parameters 7 min read Method Overriding in C# 7 min read Anonymous Method in C# 3 min read ArraysArrays in C# 6 min read Jagged Arrays in C# 4 min read Array Class in C# 5 min read How to Sort an Array in C# | Array.Sort() Method Set - 1 8 min read How to find the rank of an array in C# 2 min read ArrayListArrayList in C# 6 min read C# ArrayList Class 7 min read C# | Array vs ArrayList 2 min read StringStrings in C# 6 min read C# Verbatim String Literal - @ 5 min read C# String Class 9 min read C# StringBuilder 4 min read C# String vs StringBuilder 3 min read TupleC# Tuple 7 min read C# Tuple Class 3 min read C# ValueTuple 7 min read C# ValueTuple Struct 4 min read IndexersC# Indexers 4 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read Like