Can't run migrations, Could not load file or assembly 'System.Runtime, Version=4.2.2.0'

Describe the question Hey everyone. I’ve written few migrations in my project. It’s a .NET Core Class Library project. I’ve added FluentMigrator 3.2.15 and FluentMigrator.Runner 3.1.15 nugget packages to it. When I’m trying to run these migrations using dotnet cli like so:

dotnet fm migrate -p sqlserver -c "data source=localhost;initial catalog=MyDb;persist security info=True;Integrated Security=SSPI" -a ".\bin\Debug\netcoreapp3.1\myProject.DB.dll"

it builds VersionInfo table, but when it starts running one of my migrations it throws an error:

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=4.2.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

Not sure if this is a bug or i am doing something wrong…

Information (please complete the following information):

• OS: Windows 10
• Platform: .NET 5, .NET Core 3.x
• FluentMigrator version: 3.2.15
• Database Management System: MsSQL
• Database Management System Version: 2018

[jzabroski]

Please see: https://github.com/fluentmigrator/fluentmigrator/releases/tag/v3.2.15

Use --allowDirtyAssemblies

We need to update https://github.com/fluentmigrator/documentation to mention this flag. Come to think of it, we probably should catch unhandled exceptions and see if it’s an exception of this type System.IO.FileNotFoundException where Message starts with "Could not load file or assembly 'System.Runtime" - if you’d like to add a PR for that, that would be great! The unhandled exception handler should throw once it prints a message communicating to consider using this workaround.

[jzabroski]

@rom5jp Thanks for opening a separate ticket regarding this. I will hide your response in this thread and lock this thread, to avoid future confusion from other Googlers.