how come sharpdevelop already has a version for .net 4.5?

please see this link: http://build.sharpdevelop.net/buildartefacts/#SD45

i don't think they have publishe开发者_JAVA技巧d .net 4.5 yet, have they?

That's just a branch in preparation so that we can get started as soon as we get the .NET 4.5 bits (I think that there will be a beta release published at the Build conference).

But at the moment, that branch is not using .NET 4.5 yet; it's identical to 4.2 (except for the version number).

async/await support for code completion is already on the 4.2 branch.

If I had to guess, this would refer to the language changes (async/await) in the async CTP, which is available for download from Microsoft. However, it would be better to ask them.