Writer. Write Doc Type Async(String, String, String, String) Method
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Asynchronously writes the DOCTYPE declaration with the specified name and optional attributes.
public: virtual System::Threading::Tasks::Task ^ WriteDocTypeAsync(System::String ^ name, System::String ^ pubid, System::String ^ sysid, System::String ^ subset);
public virtual System.Threading.Tasks.Task WriteDocTypeAsync (string name, string pubid, string sysid, string subset);
public virtual System.Threading.Tasks.Task WriteDocTypeAsync (string name, string? pubid, string? sysid, string? subset);
abstract member WriteDocTypeAsync : string * string * string * string -> System.Threading.Tasks.Task override this.WriteDocTypeAsync : string * string * string * string -> System.Threading.Tasks.Task
Public Overridable Function WriteDocTypeAsync (name As String, pubid As String, sysid As String, subset As String) As Task
The name of the DOCTYPE. This must be non-empty.
If non-null it also writes PUBLIC "pubid" "sysid" where
sysid are replaced with the value of the given arguments.
sysid is non-null it writes SYSTEM "sysid" where
sysid is replaced with the value of this argument.
If non-null it writes [subset] where subset is replaced with the value of this argument.
The task that represents the asynchronous
An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."
An XmlWriter asynchronous method was called without setting the Async flag to
true. In this case, InvalidOperationException is thrown with the message "Set XmlWriterSettings.Async to true if you want to use Async Methods."