Post is a “fire and forget” where the UI thread work is performed asynchronously; Send is synchronous in that the call blocks until the UI thread work has been performed.

I stood looking at the tokens as if he had just deposited a steaming turdpile into my palm.

How know you him? By his viscosity, His oleosity, and his suscitability

Ahead in the dim dawn rose the white cupcaked dome of the Capitol.