Could not load file or assembly 'System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

[smandlik-lab]

I am getting error like "The type initializer for 'Ganss.Xss.HtmlSanitizerDefaults' threw an exception.
Could not load file or assembly 'System.Collections.Immutable'".

Below are the list of packages are used in my solution

below is stack trace from log file:

04/10/2023 22:21:29.107 (0000001F) 1000021�Action handler GETCHATTEXTV10 threw an exception.�System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: The type initializer for 'Ganss.Xss.HtmlSanitizerDefaults' threw an exception. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
at Ganss.Xss.HtmlSanitizerDefaults..cctor()
--- End of inner exception stack trace ---
at Ganss.Xss.HtmlSanitizer..ctor()
at UCN.Agent.AgentApiEventHelper.SanitizeChatHTML(String html) in D:\Agents\6\inContact\CHTXRS-API\src\Code\C#\Services\VCSvc\Providers\Agent\AgentApiEventHelper.cs:line 1890
at UCN.Agent.AgentApiEventHelper.InterperetPatronCommEvent(List1 eventMessages, Int32 chatId, Int32 requestId, Int32 version, Boolean& isValidChatEvent, Int32[] busNo) in D:\Agents\6\inContact\CHTXRS-API\src\Code\C#\Services\VCSvc\Providers\Agent\AgentApiEventHelper.cs:line 2190 at UCN.Agent.AgentApiEventHelper.ParseChatTextEvents(GetChatTextOutput& output, GenericSessionInfo chatSessionInfo, Int32 queueID, Int32 chatId, EventMessage eventMessages, Int64 contactID, SessionState state, Int32 requestId, Int32 version, Int32[] busNo) in D:\Agents\6\inContact\CHTXRS-API\src\Code\C#\Services\VCSvc\Providers\Agent\AgentApiEventHelper.cs:line 1902 at inContact.API.ActionHandlers.ApiActionHandlerOverrides.GetChatTextV10(BusinessUnitAuthContext authContext, String& chatSession, JArray& messages, Nullable1 timeout) in D:\Agents\6\inContact\CHTXRS-API\src\Code\WebDevelopment\API\Endpoints\Api\ActionHandlers\ApiActionHandlerOverrides.cs:line 2839
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at inContact.API.ActionHandlers.MethodActionHandler.Invoke(KeyValuePair2[] args) in D:\Agents\6\inContact\CHTXRS-API\src\Code\WebDevelopment\API\Endpoints\Api\ActionHandlers\MethodActionHandler.cs:line 96 at inContact.API.Controllers.DynamicActionController.ServiceDynamically(ActionHandler actionHandler, KeyValuePair2[] actionHandlerArgs) in D:\Agents\6\inContact\CHTXRS-API\src\Code\WebDevelopment\API\Endpoints\Api\Controllers\DynamicActionController.cs:line 173��(Z,ZZ,&140735166586464,)�
04/10/2023 22:21:29.107 (0000001F) 1000021�GETCHATTEXTV10: Action handler threw an exception.
Exception has been thrown by the target of an invocation.
The type initializer for 'Ganss.Xss.HtmlSanitizerDefaults' threw an exception.
Could not load file or assembly 'System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
��(Z,ZZ,&140735166585848,)�

[mmatonok]

Hi,

try to experiment with lower versions. For example HttpSanitizer below 7.x does not use above assembly.

m

[McTristan]

but it has know vulnerability issues - I'm having the same problem but with System.Collections.Immutable 8.0.0.0 and even if I install this package manually it won't ever work.

[mganss]

Which framework are you targeting?

[McTristan]

net6.0

[mganss]

Have you tried deleting the bin, obj, and .vs folders?

[McTristan]

yes of course, in fact it happens also in when trying to run the api in a .net 6 base image docker image.

[mganss]

Can you repro in a fresh console application?

[tiesont]

FWIW, I don't see this error in either a .NET6 or a .NET8 application, so it's probably not an issue with the library.

[McTristan]

It is working in .NET 8, we finally managed to migrate our projects.