In a large mixing bowl, combine cream cheese and margarine, mixing until well blended. Add flour and salt; mix well. Divide dough in half. Form each portion into a ball. Place each ball in a bowl and cover well; chill thoroughly.
On a lightly floured pastry sheet, roll out each ball to a 12-inch circle. Place 1 circle in a 9-inch pie plate. Trim edge. Pour in favorite fruit filling. Seal and flute edges. Bake according to pie directions.Servings: one 2-crust pie