Calling a method from a class with the dependency service

Hello

I have an interface called iService which has the method StartService() and I want to call a method from the MainActivity in Android:

class Service_Android : Java.Lang.Object, IService
    {
        Intent SyncIntent;
        User anUser;   
        public void StartService()
        {
            //ScheduleSyncService();
            MainActivity test = new MainActivity();
            test.ScheduleSyncService();
        }
...

In my method I am having problems with my Context, it throws an exception when I get to this point, I think is because my MainActivity inherets from Android activity and my interface delivered class is inherited Java.Lang.object.

return PendingIntent.GetBroadcast(this, 0, SyncIntent, PendingIntentFlags.NoCreate) != null;

I have tried different things like:

return PendingIntent.GetBroadcast(Forms.Context.ApplicationContext, 0, SyncIntent, PendingIntentFlags.NoCreate) != null;

or

Forms.Context

But I am still getting an exception.