Folders and files
This application demonstrates how to trace assembly loading in running applications, using the dotnet-trace tool.
Currently, this system does not collect events at launch, but only after the dotnet-trace tool has attached to the process. This sample app halts execution at launch, for the purpose of demonstration, so that assembly loads events and related information can be collected.
Note: This scenario requires .NET 5.0 and later.
First, you need to install dotnet-trace. Use the following commands to install dotnet-trace (which assumes you have the .NET SDK installed):
dotnet tool install --global dotnet-traceBuild and start the app (demonstrated on Windows):
C:\git\testapps\trace-assembly-loading\trace-assembly-loading>dotnet build
C:\git\testapps\trace-assembly-loading\trace-assembly-loading>bin\Debug\netcoreapp5.0\trace-assembly-loading.exe
Hello World!
Assemblies loaded:
trace-assembly-loading, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
Press any key to continue ...In a separate window, launch dotnet-trace. You will need to find the process ID for trace-assembly-loading.exe in task manger (in something similar).
C:\Users\rich>tasklist | findstr trace
trace-assembly-loading.ex 23212 Console 1 15,412 K
C:\Users\rich>dotnet-trace collect --providers Microsoft-Windows-DotNETRuntime:4:4 --process-id 23212
Provider Name Keywords Level Enabled By
Microsoft-Windows-DotNETRuntime 0x0000000000000004 Informational(4) --providers
Process : C:\git\testapps\trace-assembly-loading\trace-assembly-loading\bin\Debug\netcoreapp5.0\trace-assembly-loading.exe
Output File : C:\Users\rich\trace.nettrace
[00:00:00:31] Recording trace 72.466 (KB)
Press <Enter> or <Ctrl+C> to exit...
Trace completed.You can view the trace file in PerfView (for Windows).
The following demonstrates viewing assembly load information in Perfview. You need to change the directory location in PerfView to where the .nettrace file exists.
Assembly loads:
Assembly loading time:
