[Mono-bugs] [Bug 494822] New: Overriding virtual properties - .NET difference: fails to compile C# code which compiles on .NET

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=494822


           Summary: Overriding virtual properties - .NET difference: fails
                    to compile C# code which compiles on .NET
    Classification: Mono
           Product: Mono: Compilers
           Version: SVN
          Platform: i686
        OS/Version: Ubuntu
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: tom_hindle at sil.org
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Created an attachment (id=285657)
 --> (http://bugzilla.novell.com/attachment.cgi?id=285657)
Code mono can't compile, which compiles on .NET

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8)
Gecko/2009032711 Ubuntu/8.04 (hardy) Firefox/3.0.8

The following code (also included as attachment) doesn't compile with mono.

public class A
{
    public virtual object Cache
    {
        get { return null; }
        set { }
    }
}

public class B : A
{
    public override object Cache
    {
        set { }
    }
}


public class C : B
{
    public override object Cache
    {
        get { return null; }
        set { }
    }
}

Workaround exists by adding Cache.get implementation to class B

Reproducible: Always

Steps to Reproduce:
1. Compile attached code sample
2.
3.
Actual Results:  
/home/hindlet/overridePropertiesTest/overridePropertiesTest/OverridePropertiesTest.cs(25,40):
error CS0545: `OverridePropertiesTest.C.Cache.get': cannot override because
`OverridePropertiesTest.B.Cache' does not have an overridable get accessor
/home/hindlet/overridePropertiesTest/overridePropertiesTest/OverridePropertiesTest.cs(16,40):
(Location of the symbol related to previous error)

Expected Results:  
Compiles without warnings or errors

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