Question

I have developed on EXE project(use for startup task) and use following dlls of Microsoft Azure ,

It’s work very well in .Net framework 3.5 but in my case i need to use system.runtime.serialization to serialize class as json string as per following way

 public static string Serialize<T>(T obj)
        {
            System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new

            System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());
            MemoryStream ms = new MemoryStream();
            serializer.WriteObject(ms, obj);
            string retVal = Encoding.Default.GetString(ms.ToArray());
            ms.Dispose();
            return retVal;
        }

For this i need to change framework to 4.0 but at that time i got exception from Azure dlls
like

The type initializer for ‘Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment’ threw an exception

I think all Microsoft’s dlls are with backward compatibly so what’s going wrong in this matter?

I should find another way to serialize to json string?
OR
I should to change Azure’s dlls to latest version?

Thanks in Advance.

Answer 1

If you write a console app in .NET4 and want to use the RoleEnvironment then you’ll get an error:

The type initializer for ‘Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment’ threw an exception.

To get around this, just add a “useLegacyV2RuntimeActivationPolicy” to the startup tag generated in the default app.config:

<startup useLegacyV2RuntimeActivationPolicy="true">

This is because Microsoft.WindowsAzure.ServiceRuntime.dll is a mixed mode assembly. The useLegacyV2RuntimeActivationPolicy attribute is required for referencing any mixed mode assembly, not only the Windows Azure ones.