Await tasks with multiple result types

Hey Kuba, nice article!

On

Remember that supplied tasks has to have the same result type.

We should be able to do a Task.WhenAll on tasks with different return types.

await Task.WhenAll(taskReturnsInt, taskReturnsString);

// next lines would execute only after Task.WhenAll completed

// block and get result
var intResult = taskReturnsInt.Result;

// or asynchronously get result
var stringResult = await taskReturnsString;