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OrderedDictionary.IsReadOnly Property

Gets a value indicating whether the OrderedDictionary collection is read-only.

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

public bool IsReadOnly { get; }

Property Value

Type: System.Boolean
true if the OrderedDictionary collection is read-only; otherwise, false. The default is false.

Implements

IDictionary.IsReadOnly

A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created.

A collection that is read-only is simply a collection with a wrapper that prevents modification of the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes.

The following code example demonstrates the modification of an OrderedDictionary collection. In this example, the IsReadOnly property is used to determine whether the OrderedDictionary can be modified. 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, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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