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XmlWriter.WriteStartDocumentAsync Method

.NET Framework 4.5

Asynchronously writes the XML declaration.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  Name Description
Public method WriteStartDocumentAsync() Asynchronously writes the XML declaration with the version "1.0".
Public method WriteStartDocumentAsync(Boolean) Asynchronously writes the XML declaration with the version "1.0" and the standalone attribute.
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Exception Condition
InvalidOperationException

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.”

InvalidOperationException

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.”

This is the asynchronous version of WriteStartDocument, with the same functionality. To use this method, you must set the Async flag to true.

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