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XmlDocument.XmlResolver nullability change

  • Article

The nullability for XmlDocument.XmlResolver has changed in .NET 6. The property setter now accepts a nullable reference.

Previous behavior

The setter for XmlDocument.XmlResolver was annotated as not accepting null:

public virtual System.Xml.XmlResolver XmlResolver { set { } }

New behavior

The setter for XmlDocument.XmlResolver is annotated as accepting null:

public virtual System.Xml.XmlResolver? XmlResolver { set { } }

Version introduced

6.0 RC 1

Type of breaking change

This change can affect binary compatibility if you've overridden this property in a derived type.

Reason for change

The non-nullable annotation was incorrect.

If you have overridden this property in a derived type, you'll need to update your code to handle null when setting the property value.

Affected APIs