C# | Insert at the specified index in StringCollection Last Updated : 01 Feb, 2019 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://docs.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringcollection.insert?view=netframework-4.7.2 Comment More infoAdvertise with us Next Article C# | Insert at the specified index in StringCollection S Sahil_Bansall Follow Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Specialized-Namespace CSharp-Specialized-StringCollection +1 More Similar Reads C# | Get or Set at specified index in StringCollection 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. Properties: StringCollection accepts null as a valid value and allows duplicate elements. String co 2 min read C# | Copy StringCollection at the specified index of array 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.CopyTo(String[], Int32) method is used to copy the entire StringCollection values 3 min read C# | Gets or sets the element at the specified index in StringCollection StringCollection.Item[Int32] Property is used to get or set the element at the specified index. Syntax: public string this[int index] { get; set; } Here, index is the zero-based index of the entry to get or set. Return Value: It returns the element of String type at the specified index. Exception: T 2 min read C# | Remove from the specified index of the StringCollection 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.RemoveAt(Int32) method is used to remove the string at the specified index of the 3 min read C# | Check if the specified string is in the StringCollection 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 St 2 min read Like