IDictionary.Remove Method

SortedList<TKey, TValue>.IDictionary.Remove Method (Object)

.NET Framework (current version)
 

Removes the element with the specified key from the IDictionary.

Namespace:   System.Collections.Generic
Assembly:  System (in System.dll)

void IDictionary.Remove(
	object key
)

Parameters

key
Type: System.Object

The key of the element to remove.

Exception Condition
ArgumentNullException

key is null.

This method performs a binary search; however, the elements are moved up to fill in the open spot, so this method is an O(n) operation, where n is Count.

The following code example shows how to use the IDictionary.Remove of the System.Collections.IDictionary interface with a SortedList<TKey, TValue>.

The code example is part of a larger example, including output, provided for the IDictionary.Add method.

using System;
using System.Collections;
using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        // Create a new sorted list of strings, with string keys,
        // and access it using the IDictionary interface.
        //
        IDictionary openWith = new SortedList<string, string>();

        // Add some elements to the sorted list. There are no 
        // duplicate keys, but some of the values are duplicates.
        // IDictionary.Add throws an exception if incorrect types
        // are supplied for key or value.
        openWith.Add("txt", "notepad.exe");
        openWith.Add("bmp", "paint.exe");
        openWith.Add("dib", "paint.exe");
        openWith.Add("rtf", "wordpad.exe");
// Use the Remove method to remove a key/value pair. No
// exception is thrown if the wrong data type is supplied.
Console.WriteLine("\nRemove(\"dib\")");
openWith.Remove("dib");

if (!openWith.Contains("dib"))
{
    Console.WriteLine("Key \"dib\" is not found.");
}
    }
}

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0
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