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

The following code example demonstrates how to implement the IsReadOnly property. This code example is part of a larger example provided for the IDictionary class.

Public ReadOnly Property IsReadOnly() As Boolean Implements IDictionary.IsReadOnly
    Get
        Return False
    End Get
End Property

public bool IsReadOnly { get { return false; } }

public:
    property virtual bool IsReadOnly
    {
        bool get()
        {
            return false;
        }
    }

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

.NET Framework

.NET Compact Framework

XNA Framework

Reference