.net 4.0 Adoption Rate

Question

What is the adoption rate of .net 4.0?

When will it be on Windows Update?

I heard that it is smaller than 3.5, does that mean if I install .net 4.0, it will decrease the space used by the framework?

If I make an application in 3.5 and it runs on a computer that has 4.0, will my application get some of the optimizations that 4.0 uses?

Answer 1

1. You'll find most people probably won't install it until they have to use something that needs it.

2. It's an optional update on Windows update as far as I know. Optional updates tend to be ignored by a lot of people.

3. The install is small, but it won't make your .NET install any smaller. It will increase.

4. No. It will run on the .NET 3.5 platform. To use .net4 features etc you have to convert it to .net4.