C# | Insert at the specified index in 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.Insert(Int32, String) method is used to insert a string into the StringCollection at the specified index. Syntax: public void Insert (int index, string value); Parameters: index: The zero-based index at which value is inserted. value: The string to insert. The value can be null. Exception: This method will give ArgumentOutOfRangeException if the index is less than zero Or index is greater than Count. Note: Duplicate strings are allowed in StringCollection. If index is equal to Count, value is added to the end of StringCollection. This method is an O(n) operation, where n is Count. Below programs illustrate the use of StringCollection.Insert(Int32, String) Method: Example 1: CSHARP // C# code to insert a string into // the StringCollection at the // specified index 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(); // Inserting elements into the string // at specified indexes myCol.Insert(0, "A"); myCol.Insert(1, "B"); myCol.Insert(2, "F"); myCol.Insert(3, "L"); myCol.Insert(4, "Y"); myCol.Insert(5, "Z"); // Displaying the elements in StringCollection foreach(Object obj in myCol) { Console.WriteLine(obj); } } } Output: A B F L Y Z Example 2: CSHARP // C# code to insert a string into // the StringCollection at the // specified index 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(); // Inserting elements into the string // at specified indexes myCol.Insert(0, "2"); myCol.Insert(1, "4"); // This should raise exception // "ArgumentOutOfRangeException" as // index is less than 0 myCol.Insert(-3, "6"); myCol.Insert(3, "8"); myCol.Insert(4, "10"); myCol.Insert(5, "12"); // Displaying the elements in StringCollection foreach(Object obj in myCol) { Console.WriteLine(obj); } } } Output: Unhandled Exception: System.ArgumentOutOfRangeException: Insertion index was out of range. Must be non-negative and less than or equal to size. Parameter name: index Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringcollection.insert?view=netframework-4.7.2 Create Quiz Comment S Sahil_Bansall Follow 0 Improve S Sahil_Bansall Follow 0 Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Specialized-Namespace CSharp-Specialized-StringCollection +1 More Explore IntroductionC# Tutorial 2 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 Method Parameters in C# 4 min read Method Overriding in C# 7 min read Anonymous Method in C# 2 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 ArrayList Class in C# 4 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 2 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 5 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read Like