Web Server Run: Operation could destabilize the runtime

[err0x1a]

Hello, I'm trying to run the library on a Web server, but the error Operation could destabilize the runtime is occurring.

1. This application is configured as Medium Trust.
2. I think the NET Framework is 4.0, I'm talking to the host to update to 4.5.2.
3. OS Windows Server 2008 R2

But would that cause this error?

Attached print of the error stack.
Thanks in advance for any help.

[antonfirsov]

It looks like .NET Framework's CAS considers a particular operation in our code unreliable, and refuses to JIT our code. There is nothing we can do about this, I suggest to relax your CAS settings. (Not an expert on that field, but hopefully there is a way to scope it to your resizer code.)

[err0x1a]

The host could upgrade to .NET Framework 4.8, and Full Trust, but still got that error.

Even with Framework 4.8 I had to copy some DLLs:

• System.Runtime.CompilerServices.Unsafe.dll
• System.Memory.dll
• System.Buffers.dll

This is a common procedure? Or my environment is missing something?

[JimBobSquarePants]

Hmmm... I'm not sure why those dependencies are not copied on publish. I'm assuming your application build locally?

Here's the VS dialog in a .NET 4.8 an empty console application.

Here's my packages config after installing the library into an empty console application.

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="SixLabors.ImageSharp" version="1.0.3" targetFramework="net48" />
  <package id="System.Buffers" version="4.5.1" targetFramework="net48" />
  <package id="System.Memory" version="4.5.4" targetFramework="net48" />
  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net48" />
  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.3" targetFramework="net48" />
</packages>

Here's the contents of the bin folder following a build.

As you can see everything is present and correct.

[err0x1a]

I am not very familiar with Nuget, but several versions of each DLL have been downloaded, so there is a folder for NET Standard, another folder for Framework 4.X, anyway, I will try to install these versions as in your project and I will try again. I believe I just didn't upload System.Numerics.Vectors to the server.

Anyway I am not very confident that it will work, I'm about to give up, but this has nothing to do with the library. I always have these problems with ASP.NET, it is always a headache to install some libraries that require more resources.

[JimBobSquarePants]

How are you publishing to your server? You should never have to manually copy files.

[antonfirsov]

so there is a folder for NET Standard, another folder for Framework 4.X

Normally you don't need to care about internal folder structure of NuGet. Make sure you don't reference the dll-s manually, but use use Visual Studio's NuGet tools to add package references to your project.