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C# | Add a string to the end of the StringCollection

Last Updated : 11 Jul, 2025

StringCollection class is a new addition to the .NET Framework class library that represents a collection of strings. StringCollection class is defined in the

namespace.

Method is used to add a string to the end of the StringCollection.

public int Add (string value);

Here,

is the string to add to the end of the StringCollection. The value can be null.

The zero-based index at which the new element is inserted.

If Count is less than the capacity, this method is an O(1) operation. If the capacity needs to be increased to accommodate the new element, this method becomes an O(n) operation, where n is Count. Below programs illustrate the use of

// C# code to add a string to the
// end of 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();

        // Adding elements in StringCollection
        myCol.Add("A");
        myCol.Add("B");
        myCol.Add("C");
        myCol.Add("D");
        myCol.Add("E");

        // Displaying objects in myCol
        foreach(Object obj in myCol)
        {
            Console.WriteLine(obj);
        }
    }
}

// C# code to add a string to the
// end of 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();

        // Adding elements in StringCollection
        myCol.Add("2");
        myCol.Add("4");
        myCol.Add("6");
        myCol.Add("8");
        myCol.Add("10");

        // Displaying objects in myCol
        foreach(Object obj in myCol)
        {
            Console.WriteLine(obj);
        }
    }
}

• https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringcollection.add?view=netframework-4.7.2

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