No matter what you use - ConsoleApplications, Test Methods, whatever - executing ad hoc C# code sucks.
We need a repl. Inspired by scriptcs I decided to see if I can Roslyn to build one.
At this point this is just an experiment.
csx is a simple executable. Just add it to your path and you should be good to go.
with csx on you path, do:
c:>csx
>1 +3
4
>var foo = "bar";
>foo
bar
>var fizz = "buzz";
>fizz
buzz
>fizz = foo;
>fizz
bar
>exit()
c:>