What's the magic of arrays in C#

Question

int[] a = new int[5];
string[] b = new string[1];

The types of both a and b inherit from the abstract System.Array<

Answer 1

Arrays are special to CLR. They're allocated with 'newarr' instruction, and elements are accessed with 'ldelem*' and 'stelem*' instructions, not via System.Array methods;

see http://msdn.microsoft.com/en-us/library/system.reflection.emit.opcodes.newarr.aspx

You can check out ildasm output to see how arrays are represented.

So, to answer your question - no new type declaration is generated for any particular array.