Getting [NotSupportedException: Generic types are not valid.] after upgrading version from 110.2.0 -> 112.0.0

[NeelamYangal]

Issue Description
I updated the RestSharp version from 110.2.0 to 112.0.0 and encountered the following issue immediately after the site loads:
[NotSupportedException: Generic types are not valid.]

Expected behavior
It should work as it did in version 110.2.0. I expect the same behavior even after upgrading.

Stack trace
[NotSupportedException: Generic types are not valid.]
EPiServer.Framework.Initialization.InitializationModule.EngineExecute(HostType hostType, Action`1 engineAction) +1384
EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType) +226
EPiServer.Global..ctor() +42
GMGShop.Web.Global..ctor() +37
ASP.global_asax..ctor() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\5a2314ef\7a3fa5aa\App_global.asax.0.cs:0

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +142
System.Activator.CreateInstance(Type type, Boolean nonPublic) +107
System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1473
System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +186
System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +28
System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +80
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +182
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +369

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +111
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +719

Additional Details
I investigated further to determine which version might have caused the issue and found that the problem exists with RestSharp version 111.3.0. (If it helps to understand the issue)

[techwithjyo]

Facing same issue in 112.0.0 version.

[alexeyzimarev]

The issue can be easily resolved by using the latest .NET SDK (8+)

[zcs-git]

Also getting this error after upgrading restsharp, site is using .net framework 4.8.1. I can upgrade to Restsharp 111.2.0 but anything later will result in "Generic Types are Invalid".

[alexeyzimarev]

Are you getting it at runtime or when you build your code?

[zcs-git]

I get that on runtime on all versions above 111.2.0 using .net framework 4.8.1

[techwithjyo]

Same here, Getting it in the runtime.

[alexeyzimarev]

Ok, that's not good. I thought you get it at compile time. It's a bummer that the compiler allows it when building for .NET Framework target, but it cannot be executed. It can easily be fixed, it's not required to use generic attributes.

[zcs-git]

[cid:927fcac1-16bb-4fd1-8010-d5b460536edc] That would be great if it can be fixed as my client is isn't planning on moving to .net core in the near future. 🙁

…

________________________________ From: Alexey Zimarev ***@***.***> Sent: 07 November 2024 13:07 To: restsharp/RestSharp ***@***.***> Cc: Sam Zubeidi ***@***.***>; Comment ***@***.***> Subject: Re: [restsharp/RestSharp] Getting [NotSupportedException: Generic types are not valid.] after upgrading version from 110.2.0 -> 112.0.0 (Issue #2264) Ok, that's not good. I thought you get it at compile time. It's a bummer that the compiler allows it when building for .NET Framework target, but it cannot be executed. It can easily be fixed, it's not required to use generic attributes. — Reply to this email directly, view it on GitHub<#2264 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AH4PHUKZOLJEOCLLLENPNS3Z7NQYTAVCNFSM6AAAAABONT3PWGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINRSGE4TIOJUGY>. You are receiving this because you commented.

[diegotibi]

Ok, that's not good. I thought you get it at compile time. It's a bummer that the compiler allows it when building for .NET Framework target, but it cannot be executed. It can easily be fixed, it's not required to use generic attributes.

Is there any update on this?

I've lost half a day last week (I didn't saw this issue before...) because I was updating some packages on a project that still relies on .net 4.8 (and cannot be upgraded) and I didn't get that the bug was on Restsharp (I've tried something like downgrading 20 other packages before getting the right one!)