[Mono-bugs] [Bug 580564] New: GMCS Requires reference to System.Core for extension methods

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http://bugzilla.novell.com/show_bug.cgi?id=580564

http://bugzilla.novell.com/show_bug.cgi?id=580564#c0


           Summary: GMCS Requires reference to System.Core for extension
                    methods
    Classification: Mono
           Product: Mono: Compilers
           Version: 2.6.x
          Platform: Macintosh
        OS/Version: Mac OS X 10.6
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: abe.gillespie at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: No


Description of Problem:

Compilation fails if a) the project references an assembly in which that
assembly defines extension methods, b) those extension methods are used in the
project, and c) there is NO reference to System.Core.  Although it's
understandable this might make a compilation fail, the error message it reports
is very misleading and it's difficult to know it's the missing System.Core
reference that's failing things.  Another issue is VS.NET / Microsoft .NET does
not require this and therefore VS.NET projects with this scenario will compile
in VS.NET but will not compile MonoDevelop.

Speaking of MonoDevelop - this may or may not indicate a bug for MonoDevelop as
well.  Code Completion in MonoDevelop will happily suggest extension methods,
but w/o the System.Core reference - as stated above - the project won't compile
when you try.  This leads to an even more frustrating experience since the tool
is helping you find / use the extension methods but then you cannot compile.

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