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OrderedDictionary.Remove Method

Removes the entry with the specified key from the OrderedDictionary collection.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)
public void Remove(
	Object key
)

Parameters

key
Type: System.Object

The key of the entry to remove.

Implements

IDictionary.Remove(Object)
ExceptionCondition
NotSupportedException

The OrderedDictionary collection is read-only.

ArgumentNullException

key is null.

The entries that follow the removed entry move up to occupy the vacated spot and the indexes of the entries that move are also updated.

If the OrderedDictionary collection does not contain an entry with the specified key, the OrderedDictionary remains unchanged and no exception is thrown.

The following code example demonstrates the modification of an OrderedDictionary collection. In this example, the Remove method is used to remove the entry with the key "keyToDelete" from the OrderedDictionary. This code is part of a larger code example that can be viewed at OrderedDictionary.

// Modifying the OrderedDictionary 
if (!myOrderedDictionary.IsReadOnly)
{
    // Insert a new key to the beginning of the OrderedDictionary
    myOrderedDictionary.Insert(0, "insertedKey1", "insertedValue1");

    // Modify the value of the entry with the key "testKey2"
    myOrderedDictionary["testKey2"] = "modifiedValue";

    // Remove the last entry from the OrderedDictionary: "testKey3"
    myOrderedDictionary.RemoveAt(myOrderedDictionary.Count - 1);

    // Remove the "keyToDelete" entry, if it exists
    if (myOrderedDictionary.Contains("keyToDelete"))
    {
        myOrderedDictionary.Remove("keyToDelete");
    }
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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