Share via

How to fix System.BadImageFormatException

Nicholas Piazza 546 Reputation points
2021-09-15T17:19:40.473+00:00

I have a project with a method that uses a DLL from another project. It used to work just fine, but now when I try to execute that method, I get the exception:

System.BadImageFormatException: 'Could not load file or assembly 'MyLibrary, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (0x80131058)'

The project file looks like this:
<Project Sdk="Microsft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<LangVersion>9.0</LangVersion>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Reference Include="MyLibrary">
<HintPath>....\MyLibrary\MyLibrary\obj\Debug\net5.0\ref\MyLibrary.dll</HintPath>
</Reference>
</ItemGroup>

</Project>

How do I fix this problem?

Developer technologies | C#
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Nicholas Piazza 546 Reputation points
    2021-09-15T19:38:56.447+00:00

    OK, Solved the problem. Was using the DLL from .net5.0\ref. Changed to using the DLL from .net5.0 folder. Thanks for the help.

    3 people found this answer helpful.

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.