ReadContentAsAsync Method
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XmlReader.ReadContentAsAsync Method (Type, IXmlNamespaceResolver)

.NET Framework 4.6 and 4.5

Asynchronously reads the content as an object of the type specified.

Namespace:   System.Xml
Assembly:  System.Xml (in System.Xml.dll)

public virtual Task<object> ReadContentAsAsync(
	Type returnType,
	IXmlNamespaceResolver namespaceResolver


Type: System.Type

The type of the value to be returned.

Type: System.Xml.IXmlNamespaceResolver

An IXmlNamespaceResolver object that is used to resolve any namespace prefixes related to type conversion.

Return Value

Type: System.Threading.Tasks.Task<Object>

The concatenated text content or attribute value converted to the requested type.

Exception Condition

An XmlReader 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 XmlReader asynchronous method was called without setting the Async flag to true. In this case, InvalidOperationException is thrown with the message “Set XmlReaderSettings.Async to true if you want to use Async Methods.”

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

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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