Question

Got this error while trying to get this Azure Autoscale demo project with WASABi from the Enterprise Library 5.0 Integration Pack for Windows Azure working. Error thrown when all instructions followed correctly is:

Activation error occured while trying to get instance of type
Autoscaler, key “”
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Typ
e serviceType, String key) in
c:\Home\Chris\Projects\CommonServiceLocator\main\M
icrosoft.Practices.ServiceLocation\ServiceLocatorImplBase.cs:line 57
at
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstanceTSe
rvice in
c:\Home\Chris\Projects\CommonServiceLocator\main\Microsoft.Practices
.ServiceLocation\ServiceLocatorImplBase.cs:line 90 at
PB_WASABi_autoscaler.Program.Main(String[] args) in
c:\Users\daniel\Documents\Visual Studio
2012\Projects\PB-WASABi-autoscaler\PB-WASABi-autoscaler\Progr
am.cs:line 13

Windows Azure 1.7 libraries are used.

Answer 1

Tutorial (and other online sources) mostly use Azure 1.6 SDK.

It works when in the console application there is a reference to
WindowsAzure.StorageClient.dll file from Azure SDK 1.6. Under Azure
SDK 1.7 environment there is this error message: Activation error
occured while trying to get instance of type Autoscaler, key “”. In
the error details we find: Could not load file or assembly
‘Microsoft.WindowsAzure.StorageClient, Version=1.1.0.0,
Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its
dependencies. The located assembly’s manifest definition does not
match the assembly reference. (Exception from HRESULT: 0x80131040).

Solution:

A binding redirect in your app.config file will solve the issue:

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.WindowsAzure.StorageClient"
                          publicKeyToken="31bf3856ad364e35"
                          culture="neutral" />
        <bindingRedirect oldVersion="1.1.0.0"
                         newVersion="1.7.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

Source: here