You could not include a partial XML file in an .addin file using the "Include" element

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1700 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Core/Project/Src/AddInTree/AddIn/AddIn.cs

@@ -192,7 +192,9 @@ namespace ICSharpCode.Core
 								throw new AddInLoadException("Cannot use include nodes when hintPath was not specified (e.g. when AddInManager reads a .addin file)!");
 							}
 							string fileName = Path.Combine(hintPath, reader.GetAttribute(0));
-							using (XmlTextReader includeReader = new XmlTextReader(fileName)) {
+							XmlReaderSettings xrs = new XmlReaderSettings();
+							xrs.ConformanceLevel = ConformanceLevel.Fragment;
+							using (XmlReader includeReader = XmlTextReader.Create(fileName, xrs)) {
 								SetupAddIn(includeReader, addIn, Path.GetDirectoryName(fileName));
 							}
 							break;