Dictionary<TKey, TValue>.IDictionary.Remove Method

Parameters

• key
  Type: System.Object
  The key of the element to remove.

Imports System.Collections
Imports System.Collections.Generic

Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      ' Create a new dictionary of strings, with string keys,
      ' and access it using the IDictionary interface.
      '
      Dim openWith As IDictionary = _
          New Dictionary(Of String, String)

      ' Add some elements to the dictionary. 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.
outputBlock.Text &= vbLf + "Remove(""dib"")" & vbCrLf
openWith.Remove("dib")

If Not openWith.Contains("dib") Then
   outputBlock.Text &= "Key ""dib"" is not found." & vbCrLf
End If


...



   End Sub

End Class

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

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Create a new dictionary of strings, with string keys,
      // and access it using the IDictionary interface.
      //
      IDictionary openWith = new Dictionary<string, string>();

      // Add some elements to the dictionary. 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.
outputBlock.Text += "\nRemove(\"dib\")" + "\n";
openWith.Remove("dib");

if (!openWith.Contains("dib"))
{
   outputBlock.Text += "Key \"dib\" is not found." + "\n";
}


...


   }
}