Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
GitHub or Developer Community with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
The following source code returns wrong type in Mono:
var doc = XDocument.Parse("<config><item name="A" /></config>"
var temp =
from item in root.XPathSelectElements("config/*")
let packet = new
Config = item.XPathEvaluate("."),
Name = item.XPathEvaluate("name(.)"),
As bug 2383 mentioned, the MSDN said that the return type should be "a bool, a double, a string, or an IEnumerable<T>".
When running in .NET 4.0, this piece of code returns:
System.Xml.XPath.XPathEvaluator+<EvaluateIterator>d__0`1[[System.Object, mscorlib, Version=22.214.171.124, Culture=neutral, PublicKeyToken=b77a5c561934e089]]
Which is an "IEnumerable<object>".
However, when running in Mono 126.96.36.199-1ubun, it returns:
It is an Iterator. And it could not cast into IEnumerable<object>, or IEnumerable.
Notice: It is quite different from bug 2383, which seems return a type which could cast into IEnumerable at least. However, in my case, it couldn't. So it is not easy to walk around so that it could run with both .NET and Mono.
Already fixed in mono 2.11