In a large bowl combine the flour and salt. Dice up the butter and shortening. Using a pastry cutter or stand mixer, cut in your butter and shortening until it is about the size of oats.
Add the egg and vinegar and just enough water for your dough to combine.
Mix and knead your dough until combined. Be careful not to over knead.
Wrap your dough in plastic wrap and let it rest for 4 hours or overnight in the fridge.
Roll out your dough until it is about ½ inch thick.
Transfer your dough onto a pie dish and press it down into the dish.
Trim off the extra dough around the edges.
Tuck your edges in and then crimp them using your thumb on one hand and your thumb and index finger on the other.
Brush your crust with an egg wash. Using a fork poke some holes in the bottom of your pie crust to keep it from puffing up.
In your crust place parchment paper and pie weights (or rice or oats).
Bake your crust at 350 degrees F for 15 minutes. Then take out the pie weights and parchment paper. Continue to bake your crust for another 35 minutes. At about the last 15 minutes, lightly place some aluminum foil on the top of your crust if the edges are getting too brown.
Let cool completely.