Bug 9813 - CS0246 error message can be misleading
Summary: CS0246 error message can be misleading
Status: RESOLVED FIXED
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Safar
URL:
Depends on:
Blocks:
 
Reported: 2013-01-27 16:26 UTC by Alex Corrado [MSFT]
Modified: 2013-01-30 09:56 UTC (History)
1 user (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Alex Corrado [MSFT] 2013-01-27 16:26:13 UTC
Create a new C# library project and add this class:

using System;
using Color = Tuple<float,float,float,float>;

namespace Testcase
{
	public static class Foo
	{
	}
}


You will get a compile error on the second line:
error CS0246: The type or namespace name `Tuple' could not be found. Are you missing `System' using directive?

Clearly, we are not missing the using directive.

Changing the second line to the fully qualified name, System.Tuple<float,float,float,float>, causes the error to go away.
Comment 1 Marek Safar 2013-01-30 09:56:20 UTC
Fixed in master