System.Memory correct version missing

[betsegaw]

Information

• OS: Windows
• Version: 0.43.1-preview.0.16
• Terminal: Windows Terminal

Describe the bug
Loading nuget package in Powershell and trying to use it results in an exception with Could not load file or assembly 'System.Memory...

To Reproduce

1. Download the nuget package into a folder
2. Load it into Powershell with command [System.Reflection.Assembly]::LoadFrom("/path/to/lib/netstandard2.0/Spectre.Console.dll")
3. Try to use it with [Spectre.Console.AnsiConsole]::Markup("[underline red]Hello[/] World!")

Expected behavior
Nicely formatted output

Actual output

Exception calling "Markup" with "1" argument(s): "Could not load file or assembly 'System.Memory, Version=4.0.1.0,
Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file
specified."
At line:1 char:1
+ [Spectre.Console.AnsiConsole]::Markup("[underline red]Hello[/] World! ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : FileNotFoundException

Additional context
It seems that this is a lack of binding redirects that ensure that the nuget package can use the latest version rather than lock onto a specific version?

Also, might be resolved by including the following

<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
<GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>

[nils-a]

@betsegaw No, BindingRedirects are all automatic these days. If those are needed, they need to be created at the entry-point of the application.

The code you showed above works fine in PowerShell 7.

Now, if you were on an old PowerShell 5.x - that's probably .NET Framework 4.6 or something. You'd need to add binding-redirects manually to PowerShell.

Something like

nuget install system.memory -outputdirectory .
$memory = [reflection.assembly]::LoadFrom((Resolve-Path .\System.Memory.4.5.4\lib\netstandard2.0\System.Memory.dll))
$redirect = [ResolveEventHandler] {
  param($sender, $e)

  if ($e.Name -like "System.Memory,*") { return $memory }

  return $null
}
[appdomain]::CurrentDomain.add_AssemblyResolve($redirect)

Should get you on the right track, note that this is probably not complete: System.Memory comes with additional dependencies, which need probably also be added to the redirect.