Preheat oven to 375 degrees. Unroll crescent dough into 8 triangles. Place 4 pepperoni slices on the wide end of each triangle. Place one half of the string cheese on top of the pepperoni. Roll up and place at least two inches apart on a greased cookie sheet. Mix the Italian seasoning and melted butter and brush over the top of the roll ups. Bake 10 to 12 minutes or until golden brown. Serve warm with your favorite sauce.