Describe how to create and use array in .NET.
Arrays treat several items as a single collection.
Following are the ways to create arrays:
Declaring a reference to an array
Int32[] a;
Create array of ten Int32elements
b = new Int32[10];
Creating a 2-dimensional array
Double[,] c = new Double[10, 20];
Creating a 3-dimensional array
String[,,] d = new String[5, 3, 10];
