Preheat oven to 350°F (175°C).

Prepare pie crust according to package directions for a filled one-crust pie, using a 9-inch pie pan.

Flute the edges of the pie crust as desired.

In a large bowl, whisk together eggs, corn syrup, and sugar until well combined.

Melt the semi-sweet chocolate chips in a microwave or double boiler.

Add the melted chocolate, vanilla extract, and melted margarine to the egg mixture and stir until smooth.

Stir in the pecans.

Pour the pecan mixture into the prepared pie crust.

Bake for 45-50 minutes, or until the filling is set and the crust is golden brown.

Let the pie cool completely before serving.