Strange behavior with Process.Start and dfsdiag.exe

Question

DfsDiag.exe is located by default in C:\windows\system32. I try to start a process for it with Process.Start but I always seem to get the error The system cannot find the file specified. I don't seem to have the problem with anything else so far.

I tried...

• Specifying the full path @"C:\Windows\System32\DfsDiag.exe"
• Copying the file to the running directory.

The former failed while the latter worked. I can't for the life of me work out why.

(OS is Windows Server Standard 2008 R2)

Answer 1

32-bit app? You've fallen foul of filesystem redirection. Try C:\Windows\SysNative.