Differences between 32 and 64-bit .NET (4) applications

Question

What are the differences between 32 and 64-bit .NET (4) applications?

Often 32-bit applications have problems running on 64-bit machines and conversely. I know I ca

Answer 1

x64 managed code will use Streaming SIMD Extensions (SSE) for double/float computation instead of x87 Floating Point Unit (FPU) when using x86 managed code.