Azure Cloud Service Web Role not starting - Unhandled exception - Unable to find Assembly

Question

I have an ASP.NET Web API hosted in a cloud service web role. I have added a WebRole class extending RoleEntryPoint which is attempting to retrieve an IoC castle Windsor container which has dependencies setup in the StartUp.cs of my web API.I want to then retrieve a logger instance I have registered and use that in my WebRole.

public class WebRole : RoleEntryPoint
{
    private ICancellationTokenSourceProvider _cancellationTokenSourceProvider;
    public override bool OnStart()
    {
        try
        {
            var container = IoC.GetContainer();
             _cancellationTokenSourceProvider = container.Resolve<ICancellationTokenSourceProvider>();
        }
        catch (Exception)
        {

            throw;
        }

        return base.OnStart();
    }

---

However when I try to deploy this to the cloud service I get the following exception:

Unhandled Exception: Unable to find assembly 'Castle.Windsor, Version=3.2.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc'. at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAssemblyInfo assemblyInfo, String name) at System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String objectName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWithMapTyped(BinaryObjectWithMapTyped record) at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Bina ry.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeObject(MemoryStream stm) at System.AppDomain.Deserialize(Byte[] blob) at System.AppDomain.UnmarshalObject(Byte[] blob) ' [2020-06-19T16:48:01Z] Last exit time: [2020/06/19, 16:48:05.617]. Last exit code: 0.

I have tried to find the cause and solution to this extensively.

• I have tried to add binding redirects to the missing assembly in MyApi.dll.config and ensuring it is set to copy always.
• I have also ensured the assembly has Copy Local set to true as well.

However, I still get this error every time and the web role keeps restarting trying to recover from this exception.

Answer 1

Read your problem description carefully, I think the problem should be in the problem of loading assembly such as MyApi.dll .

First, because of the limitations of Azure's cloud environment, it may not be possible to load some third-party assemblies. You can refer to this post .

After the Azure Cloud Services service is created, you can get a virtual machine, and you can log in using RDP . So I suggest that you create your application first, do not contain the code that references the third-party .dll , to ensure the successful deployment. Then log in with RDP method to the virtual machine, open cmd , use the regsvr32 xxx.dll related command to register the third-party .dll file in the registry, and then redeploy your complete project now. Check if the problem is solved.