hi stoyan,
    I using  the net diagram in JavaApplet mode.I have to upgrade Control to 3.0.
    I want to use the Diagram.saveToString method to get the XML as a string by JavaScript on client-side.
    I do so in accordance with you give me codes.Javascript Code is as follows:
function test()
{
var applet = <%= diagramView.AppletElement %>;
var diagram = applet.getDiagram();

// Base64 = 1;
// Xml = 2;
// CompressedXml = 3;
var xml = diagram.saveToString(2, true);
alert(xml);
}

But i found the Chinese characters are still garbled.
Running on my computer, generate the xml data is always utf-8 format, rather than utf-16 format.
I think it was caused by this question,How can I do to utf-16 format to generate data?