Does the new 'dynamic' C# 4.0 keyword deprecate the 'var' keyword?

Question

When C# 4.0 comes out and we have the dynamic keyword as described in this excellent presentation by Anders Hejlsberg, (C# is evolving faster than I can keep up.. I didn\'t have

Answer 1

Yes you will still need var:

Var is a variable whose type will be inferred by the compiler.
dynamic will have its type assigned at runtime

So:

Var i = "Hello World"

will have its type inferred as a string type in doing so intellisence will give you all the methods that string can use like,

i.Split("/")

Where as:

dynamic i = "Hello World"

won't have its type inferred untill runtime because the complier dosn't know what type it is yet, but will still let you do:

i.Split("/")

but when it calls the method that you need it may fail because the type is wrong and the method isn't there.