.NET enable and disable Fusion log to investigate assembly loading issues

Jeroen PluimersAugust 23rd, 2015Last Updated: August 23rd, 2015

0 404 1 minute read

Had to investigate some Assembly Loading issues, so I wrote two batch files to enable and disable the .NET Fusion Log:

 reg add "HKLM\Software\Microsoft\Fusion" /v EnableLog /t REG_DWORD /d 0 /f

Disable-Fusion-Log-.NET-Assembly-Binding-Logging.bat hosted by GitHub.

 reg add "HKLM\Software\Microsoft\Fusion" /v EnableLog /t REG_DWORD /d 1 /f

Enable-Fusion-Log-.NET-Assembly-Binding-Logging.bat hosted by GitHub.

They modify the HKLM\Software\Microsoft\Fusion key REG_DWORD value EnableLog.

A few notes:

It is very important to turn of the Fusion log settings as soon as you are finished investigating. Fusion logs potentially take a lot of resources.
When you have a .NET host like ISS, you have to restart that host (for instance by running iisreset)
There is also Fuslogvw.exe Assembly Binding Log Viewer, but I like logging over viewing as logs are persistent.
There are more values under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion you can configure; see the answer by Gary Kindel on StackOverflow:
- DWORD ForceLog set value to 1
- DWORD LogFailures set value to 1
- DWORD LogResourceBinds set value to 1
- String LogPath set value to folder for logs e.g. C:\FusionLog\ (ensure the final backslash is there and the folder exists).

Reference:

	`/**`
	`* Compile TypeScript`
	`*/`
	`gulp.task('typescript-compile', ['vet:typescript', 'clean:generated'], function () { https://en.wikipedia.org/wiki/C_Sharp_(programming_language)`
	`log('Compiling TypeScript');`
	`exec('node_modules/typescript/bin/tsc -p src');`
	`https://github.com/tonysneed/Demo.VS2015.TypeScript`

	`<div class="attribution">`
	`<table>`
	`<tbody>`
	`<tr>`
	`<td><span class="reference">Reference: </span></td>`
	`</tr>`
	`</tbody>`
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	`</div>`