How to change csdef defined in cspkg

I did something similar to what you need to distinguish between test and live environments. First of all, you need to create a new .csdef file that you want to use for your alternative settings. This should be a complete file, as we are just going to replace it with the original one. Now we need to add this to the cloud project. Right-click on the cloud project and select the offload project. Right-click on it again and select "Edit" [Project Name]. There's a section that looks something like this:

<ItemGroup>
    <ServiceConfiguration Include="ServiceConfiguration.Test.cscfg" />
    <ServiceDefinition Include="ServiceDefinition.csdef" />
    <ServiceConfiguration Include="ServiceConfiguration.cscfg" />
</ItemGroup>

Add a new ServiceDefinition element that points to your newly created file. Now find the following line:

<Import Project="$(CloudExtensionsDir)Microsoft.WindowsAzure.targets" />

, TargeProfile, , , , .csdef

<Target Name="AfterResolveServiceModel">
    <!-- This should be run after it has figured out which definition file to use
        but before it done anything with it.  This is all a bit hard coded, but
        basically it should remove everything from the SourceServiceDefinition
        item and replace it with the one we want if this is a build for test-->
    <ItemGroup>
      <!-- This is an interesting way of saying remove everything that is in me from me-->
      <SourceServiceDefinition Remove="@(SourceServiceDefinition)" />
      <TargetServiceDefinition Remove="@(TargetServiceDefinition)" />
    </ItemGroup>
    <ItemGroup Condition="'$(TargetProfile)' == 'Test'">
      <SourceServiceDefinition Include="ServiceDefinition.Test.csdef" />
    </ItemGroup>
    <ItemGroup Condition="'$(TargetProfile)' != 'Test'">
      <SourceServiceDefinition Include="ServiceDefinition.csdef" />
    </ItemGroup>
    <ItemGroup>
      <TargetServiceDefinition Include="@(SourceServiceDefinition->'%(RecursiveDirectory)%(Filename).build%(Extension)')" />
    </ItemGroup>
    <Message Text="Source Service Definition Changed To Be: @(SourceServiceDefinition)" />
  </Target>

, " ". , , , .csdef. , .csdef, , , .