"Test Center" how to convert a collection to an array?

parsing: Collections and arrays have many common places, both of which are used as data containers for holding data. The length of the array is fixed, but the length of the collection can be dynamically extended, and the array can be manipulated directly by its elements through the index, so the performance and efficiency are high. In practice, it is possible to use and co-operate to hold data for temporary variables, but to return the processing results to the array. Reference Answer: The ToArray (t[] A) method is defined in the collection interface to convert the collection to an array, where T is a generic type.

"Test Center" how to convert a collection to an array?