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 StringCollection.
Syntax:
public void RemoveAt (int index);
Here, index is the zero-based index of the string to remove.
Exception: This method will give ArgumentOutOfRangeException if the index is less than zero or index is equal to or greater than Count.
Note: This method is an O(n) operation, where n is Count.
Below programs illustrate the use of StringCollection.RemoveAt(Int32) Method:
Example 1:
// C# code to remove the string at the // specified index 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();
// 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);
Console.WriteLine( "Elements in StringCollection myCol are : " );
// Displaying elements in StringCollection
// named myCol
foreach (Object obj in myCol)
Console.WriteLine(obj);
// Removing element at index 3
myCol.RemoveAt(3);
Console.WriteLine( "Elements in StringCollection myCol are : " );
// Displaying elements in StringCollection
// named myCol
foreach (Object obj in myCol)
Console.WriteLine(obj);
}
} |
Elements in StringCollection myCol are : A B C D E Elements in StringCollection myCol are : A B C E
Example 2:
// C# code to remove the string at the // specified index 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();
// creating a string array named myArr
String[] myArr = new String[] { "1" , "2" , "3" , "4" , "5" };
// Copying the elements of a string
// array to the end of the StringCollection.
myCol.AddRange(myArr);
Console.WriteLine( "Elements in StringCollection myCol are : " );
// Displaying elements in StringCollection
// named myCol
foreach (Object obj in myCol)
Console.WriteLine(obj);
// Removing element at index -5
// It should raise "ArgumentOutOfRangeException"
// as index is less than 0
myCol.RemoveAt(-5);
Console.WriteLine( "Elements in StringCollection myCol are : " );
// Displaying elements in StringCollection
// named myCol
foreach (Object obj in myCol)
Console.WriteLine(obj);
}
} |
Output:
Unhandled Exception:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Reference: