To enable assembly bind logging, set the registry value below.

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion]
"EnableLog"=dword:00000001

Save the above contents to a file with a .reg extension and double-click it to register in the registry.

To disable it, delete the registry value using regedit.exe.

Assembly probing, Fusion and fuslogvw in 5 minutes - B# .NET Blog