Stephane,

SQL Server is expecting the first line to look like the following:

<?xml version = "1.0" ?>

You could strip out the information in the XML string before assigning it to the CommandText.

>Thanks Cathi !
>
>but it only works if i remove the first line:
>
>
>if i leave it i get an exception :
>XML Parse Error: Unable to switch the encoding.
>
>Any idea ?
>
>
>>Hi Stephane,
>>
>>You are actually trying to update an updategram instead of a diffgram. To update this, you need to install the the SqlXml 3.0 package and use the SqlXMLCommand object.
>>
>>Here is some sample code on how to use this in ADO.NET:
>>
>>

>>SqlXmlCommand objSXC = new SqlXmlCommand("Driver={SQL
>>Server};Server=MyServer;Database=MyDatabase;Uid=MyUser; Pwd=MyPassword;");
>>
>>objSXC.CommandType = SqlXmlCommandType.UpdateGram;
>>
>>objSXC.CommandText = MyXMLstring;
>>
>>objSXC.ExecuteNonQuery ();
>>

>>
>>Here is the link to download SqlXml 3.0:
>>
>>http://msdn.microsoft.com/downloads/default.asp?url=/downloads/sample.asp?url=/msdn-files/027/001/824/msdncompositedoc.xml
>>
>>>How do i save a Diffgram back to SQL Server using ADO.NET and C#? Here is the diffgram i want to save:
>>>
>>>

>>>
>>><?xml version = "1.0" encoding="Windows-1252" standalone="yes"?>
>>><root xmlns:updg="urn:schemas-microsoft-com:xml-updategram">
>>>	<updg:sync>
>>>		<updg:before>
>>>			<testtable>
>>>				<descr>BEFORE CHANGE</descr>
>>>				<identity_column>5</identity_column>
>>>			</testtable>
>>>		</updg:before>
>>>		<updg:after>
>>>			<testtable>
>>>				<descr>AFTER CHANGE</descr>
>>>				<identity_column>5</identity_column>
>>>			</testtable>
>>>		</updg:after>
>>>	</updg:sync>
>>></root>
>>>
>>>