ResolveEntity Method
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XmlReader.ResolveEntity Method ()


When overridden in a derived class, resolves the entity reference for EntityReference nodes.

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

Public MustOverride Sub ResolveEntity

Exception Condition

The reader is not positioned on an EntityReference node; this implementation of the reader cannot resolve entities (CanResolveEntity returns false).


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.”

If the reader is positioned on an EntityReference node (XmlNodeType.EntityReference), if Read is called after calling this method, the entity replacement text is parsed. When the entity replacement text is finished, an EndEntity node is returned to close the entity reference scope.


After calling this method, if the entity is part of an attribute value, you must call ReadAttributeValue to step into the entity.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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