Update Mono to support C# 4.0

[quizunder]

C# 4.0 is supported since
Ubuntu Oneiric (11.10) include

[athena]

Is there any particular reason you would want C# 4.0?

[quizunder]

C# 4.0 features:
- Dynamic binding support
- Generic type variance
- Optional parameters
- Named arguments

.NET 4.0 frameworks:
- Parallel Framework + PLinq
- Code Contracts

Mono 2.8+ Improvements:
- New Garbage Collection engine (mono --gc=sgen or mono-sgen)
- Large performance improvements

Mono 2.10 Improvements:
- Improved the Mono runtime's sandbox ()

Of course it's not big changes, but you're already using Ubuntu for Java, C++, PHP.
Upgrade to Ubuntu 11.10 is easier prior the competition than later.

[athena]

I don't see any game breakers at all.

You're not allowed to run anything in parallel and you can't use the external code contracts library.

There has been so many issues with C# and changing version, so would it really be necessary to introduce new bugs just before the competition starts?

[Savaron]

I would like to use Tuples, that are only available since C# 4.0 and thus are not supported by your mono-version.

[casual]

Hello, I would like to see Mono upgraded to the latest stable version too. It seems to me that 2.10.5 has received enough testing and point releases to be considered stable.
As for the reasons, both Mono 2.8 and 2.10 feature performance improvements and bug fixes. That should be enough of a reason to upgrade from venerable 2.6, even if not all features of C# 4 are implemented there, or considered "game breaker".

[TeamUnknown]

I'm interested in this. So what's the status of adding Mono 2.10? Have you decided not to do it?

[PostScriptum]

Hi!
I also would like to write on C# 4.0. Actually I have written my bot on it, but now I can't compile my code. C# 4 has many useful features: default parameters, tuples, ect.
Additional problem was with string.Join() which don't want to receive IEnumerable<string>.
Please, include the C# 4 compiler...