Are there any considerations needed to be taken running your .net program on x64 vs x86?

Question

I believe the architecture type (x86 vs x64) is abstracted away for you when making .Net programs, but are there any other considerations that can cause problems?

Answer 1

• Reading and writing to 64 bit values is not thread safe on a 32 bit platform. Reading a 64 bit value takes two operations which could be interrupted by a context switch. See the MSDN article on Threading.Interlocked.Read for more information.

• Also agree entirely with torial's answers! :-)