Sync and Async methods should have same order of parameters and proper return type

[RalfKoban]

In case there is a synchronous method that has an asynchronous counterpart, both methods should have the same kind of parameters, in the same order.

The return value of the asynchronous method should be Task for void synchronous methods or Task<Xyz> for synchronous methods that return a Xyz.

Example:

int DoSomething(int x, int y, int z);

should have following async counterpart (if needed at all)

Task<int> DoSomethingAsync(int x, int y, int z);

In case the counterpart is e.g.

Task<int> DoSomethingAsync(int x, int z, int y);

we should report a violation because the parameters y and z are switched.