C# List of arrays to array of arrays

Question

I am new to C#. I am writing a program in which a list changes size depending on user input. The list is of GPS coordinates so it is

List<double[]> coordinates= new List<double[]>();

However I have a function that needs the GPS coordinates in double[][] format, an array of arrays. It seems like this would be very straightforward because it seems like a list of arrays is already an array of arrays. However, the most logical thing I can think to do fails:

double[][]test = new double[][]{};

test = coordinates.ToArray;

with "Cannot convert method group 'ToArray' to non-delegate type 'double[][]'. Did you intend to invoke the method?"

Not sure what that means or how to fix. Any advice is appreciated.

Answer 1

要在C＃中调用方法，需要使用括号，如下所示： test = coordinates.ToArray();

Answer 2

你忘了括号：

double[][]test = coordinates.ToArray();