.NET Fusion logger: What is the difference between standard and natural images?

Question

In the .NET fusion logger (FUSLOGVW.exe), what do the two options do in the lower right of the screen ?

Log Categories + Default + Native Images 

And how can I use one of them to diagnose a mixed-mode build problem?

Answer 1

Custom images are files created by ngen.exe. It contains precompiled machine code for the assembly, so no JIT compiler is needed. All nodes of the .NET framework are assembled. They have a .ni.dll file extension.

This is usually not of interest to you if you are trying to fix the build resolution issue. But you can see that they load if you select "Native Images" instead of "Default".