Hello there! Are you ready to solve another engaging problem today? We have a practical task that will enhance your problem-solving skills. It involves critical aspects of programming — dealing with arrays and using techniques such as sorting and the two-pointer method. So, let's jump in!

Our task is as follows. Suppose you have two equally long arrays, A and B, with lengths varying from 1 to 1000, with each element being a unique positive integer ranging from $1$ up to $10^6$. Your challenge is to create a C# method that performs the following steps:

1. For each element in array , double its value to get .