Gets or sets the internal DTD subset.
Assembly: System.Xml (in System.Xml.dll)
This property, along with DocTypeName, PublicId, and SystemId, provides all the document type declaration information. It is used to find and load the necessary DTD information so that you get all the default attributes and entities defined in the DTD.
The DTD is used for entity resolution, not for document validation.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8