Error placing conditional compilation in AssemblyInfo.cs file

When I put this in my AssenblyInfo.cs it does not compile

#if DEBUG
[assembly: Application(Debuggable=true)]
#else
[assembly: Application(Debuggable=false)]
#endif

and gives error in almost all classes.

  

Unexpected failure of the "GenerateJavaStubs" task.   System.InvalidOperationException: Application may not have both type   with an [Application] attribute and an [assembly: Application]   attribute. in   Xamarin.Android.Tasks.ManifestDocument.CreateApplicationElement (XElement   manifest, String applicationClass, List 1 subclasses, List 1   selectedWhitelistAssemblies) in   Xamarin.Android.Tasks.ManifestDocument.Merge (List 1 subclasses, List 1   selectedWhitelistAssemblies, String applicationClass, Boolean embed,   String bundledWearApplicationName, IEnumerable'1   mergedManifestDocuments) in   Xamarin.Android.Tasks.GenerateJavaStubs.Run (DirectoryAssemblyResolver   res) in Xamarin.Android.Tasks.GenerateJavaStubs.Execute () in   Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute ()   in   Microsoft.Build.BackEnd.TaskBuilder.d__26.MoveNext () Authorizer.Android

So there's the AssemblyInfo.cs file

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Android.App;
using Xamarin.Forms;

#if DEBUG
[assembly: Application(Debuggable=true)]
#else
[assembly: Application(Debuggable = false)]
#endif

// General Information about an assembly is controlled through the following 
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("Autorizador.Android")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("Autorizador.Android")]
[assembly: AssemblyCopyright("Copyright ©  2014")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: ComVisible(false)]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Build and Revision Numbers 
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]

// Add some common permissions, these can be removed if not needed
[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
//[assembly: ExportRenderer(typeof(TabbedPage), typeof(BadgedTabbedPageRenderer))]

Do I need to enable some permissions or not? I'm waiting.