In pure .Net code one probably does not need to know. But when linking to legacy native DLLs one may need to know. The following is an easy test. A pointer is 8 bytes in a 64 bit world and 4 bytes when in 32 bit:
| C:\projects\generaldynamics\vbnet\ConsoleApplication6\ConsoleApplication6\bin>type ..\Program.cs using System; using System.Collections.Generic; using System.Linq; using System.Text;
namespace ConsoleApplication6 { class Program { static void Main(string[] args) { Console.Out.WriteLine("{0}", IntPtr.Size); } } } C:\projects\generaldynamics\vbnet\ConsoleApplication6\ConsoleApplication6\bin>x64\Release\ConsoleApplication6.exe 8
C:\projects\generaldynamics\vbnet\ConsoleApplication6\ConsoleApplication6\bin>Debug\ConsoleApplication6.exe 4 |
This is an important aspect for people dealing with math in .NET code. Although we compile our math library in platform agnostic mode, we have had quite a few issues in the past getting same test results in 32-bit and 64-bit platforms. In particular, errors add up differently in these two platforms.
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