Ninject Contextual Binding for different environments

gistfile1.cs

void Main()
{
    // create kernel with conventions
    using(var kernel = InitializeKernel())
    {   
        var backend = kernel.Get<IBackend>();
        
        Assert.That(backend, Is.Not.InstanceOfType(typeof(ProdBackend))
                                .And.InstanceOfType(typeof(TestBackend)));
    }
}

private static readonly Func<bool> IsCurrentEnvironmentProduction = 
    () => Environment.MachineName == "Production.Server";
 
public static IKernel InitializeKernel() 
{ 
    var kernel = new StandardKernel();
 
    // binding for production
    kernel
        .Bind<IBackend>()
        .To<ProdBackend>()
        .When(request => IsCurrentEnvironmentProduction());
    
    // binding for test environment
    kernel
        .Bind<IBackend>()
        .To<TestBackend>()
        .When(request => !IsCurrentEnvironmentProduction());
 
    return kernel; 
}

public interface IBackend { }
public class ProdBackend  : IBackend { }
public class TestBackend   : IBackend { }