The address is valid, but it is nearing its lease lifetime and should not be used by applications.
Syntax
DuplicateAddressDetectionState Deprecated
Requirements
Namespace: System.Net.NetworkInformation
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0
Since: .NET 2.0
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0
Since: .NET 2.0