Parameters

ns

The namespace URI for the name.

localName

The local name to write.

ns

The namespace URI for the name.

Exceptions

Type	Reason
ArgumentException	localName is null, is string.Empty, or is not a valid XML name.
InvalidOperationException	The XmlWriter.WriteState is WriteState.Closed.
System.Xml.XmlException	localName is not a valid XML name.

Remarks

If ns maps to the current default namespace, no prefix is generated.

When writing attribute values, this method generates a prefix if ns is not found. When writing element content, it throws an exception if ns is not found.

Note:

If a class derived from the System.Xml.XmlWriter does not override this method localName is not checked to be a valid W3C XML name. In such case, before calling this method, the validity of the string can be checked by XmlReader.IsName(string) method.

For the asynchronous version of this method, see XmlWriter.WriteQualifiedNameAsync(string, string).

Requirements