You could not trace dot net file by OllyDbg or SoftICE. It is not a normal PE files. Indeed program runs in Virtual Machine of dot net core. It is clear by normal assembly debugger, you do not have any success to trace by OllyDbg. It has IL assembly langauge codes which run in a VM such as Java VM. If you want to trace a dot net program, the following link might be useful to you:

http://www.smidgeonsoft.prohosting.com/pebrowse-pro-interactive-debugger.html