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1. #One note version version 17.7070.58021.0 32 or 64 bit 64 Bit
2. #One note version version 17.7070.58021.0 32 or 64 bit code
3. #One note version version 17.7070.58021.0 32 or 64 bit plus

So unlike the other two points this one will break your assembly regardless of what you've written in it.

#One note version version 17.7070.58021.0 32 or 64 bit code

Instruction Set Architectureģ2bit and 64bit ( x86 and AMD64) are similar but completely different ISAs which means that code which was assembled to run under one will not run under the other. Net virtual machine as explained in the next point. Generally we don't deal with memory at this low level, this is possible because of the. So programs compile to work under memory segmentation may have problems working in a non segmented environment.

In 64bit this feature is mostly disabled. The old 32bit processors used to have a feature called Memory segmentation which allowed the OS or a Supervisor program to declare regions of memory that are accessed using special CPU registers called Segment registers. As for the first point - this is the reason you can get the size (using sizeof) of a class no the size of a struct containing class references. Not having the option to play with pointers solves the 2nd point. Net languages are safe - you don't get to play with pointers (generally, unless you are under an unsafe context). In some cases the size of the pointer may be integral for these computations to yield correct results.

#One note version version 17.7070.58021.0 32 or 64 bit 64 Bit

In a 32bit execution environment pointers are 32 bit long, and as you'd expect int 64 bit they are 64 bit long. The differences between 32bit and 64bit that "breaks" object file are either: Pointer size, Memory model and most importantly the instruction set architecture (ISA). Net virtual machine, at runtime the VM uses the JITer to produce machine instructions which can be executed by the CPU. Net assemblies are never assembled in to machine specific instructions, instead they are compiled into MSIL which runs under the.

The built application now runs as a 64-bit app, and TFS/unit tests run happily. The trick was to uncheck the Prefer 32-bit option in the WPF (startup) project's properties.

Even the projects referencing the unmanaged 64-bit DLL seem happy with this (not sure why). So in the end it seems that I was simply able to set all project platforms to "Any CPU" rather than "圆4" (the TFS server wasn't able to run unit tests with the latter). Net assembly DLLs referenced by the projects in my solution were fine?Īnd what actually determines whether my application is built as 64-bit? I changed all of the solution's projects to "圆4", but would it still have worked if they were left as "Any CPU", and I only changed the WPF (startup) project to "圆4"? So my question (finally) is: why did I only have an issue with the C++ DLL, but the many. The only issue I had was with a C++ DLL referenced by one of the projects, which needed rebuilding as 圆4.

#One note version version 17.7070.58021.0 32 or 64 bit plus

I've always skirted around the issue of building 64-bit desktop apps as I somehow got it in my head that it wasn't a trivial thing to do, plus I guess I didn't really understand the solution "configuration manager" dialog, platforms and configurations, either.Īnyway, I've just tried converting an existing application by simply changing all of the solution projects' platforms to 圆4, and it worked.