2004-04-13 Atsushi Enomoto <atsushi@ximian.com>

2004-04-13  Atsushi Enomoto  <atsushi@ximian.com>

	* DataSet.cs :
	  - InferXmlSchema(): Throw explicit NotImplementedException now.
	  - Don't put XML declaration everywhere. Write just for filename arg.
	  - xmlns="" should not be written. Maybe WebService problem is
	    because default namespace is overwritten. This patch will keep
	    the WS problem away and actually fixes some unit tests (i.e. use
	    explicit String.Empty for null namespace in WriteStartElement()).
	  - MoveToContent() should always be called, not only when
	    LocalName="xml". It will ignore prolog (DTD, PI, comment etc.).
	  - Even XmlReadMode is DiffGram, reader might not be "diffgram"
	    element. As to MSDN, diffgram does not contain schema.

svn path=/trunk/mcs/; revision=25448