.NET Core: attributes that execute before and after method

Question

In Java, it is possible to use AspectJ for adding behavior before and after executing a method, using method annotations. Since C# Attributes seem to be very similar, I was

Answer 1

The question is similar to Run a method before all methods of a class, hence the same answer applies to both. Use https://github.com/Fody/Fody . The licencing model is based on voluntary contributions making it the better option to PostSharp which is a bit expensive for my taste.

[module: Interceptor]
namespace GenericLogging
{

[AttributeUsage(AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Assembly | AttributeTargets.Module)]
    public class InterceptorAttribute : Attribute, IMethodDecorator
    {
        // instance, method and args can be captured here and stored in attribute instance fields
        // for future usage in OnEntry/OnExit/OnException
        public void Init(object instance, MethodBase method, object[] args)
        {
            Console.WriteLine(string.Format("Init: {0} [{1}]", method.DeclaringType.FullName + "." + method.Name, args.Length));
        }

        public void OnEntry()
        {
            Console.WriteLine("OnEntry");
        }

        public void OnExit()
        {
            Console.WriteLine("OnExit");
        }

        public void OnException(Exception exception)
        {
            Console.WriteLine(string.Format("OnException: {0}: {1}", exception.GetType(), exception.Message));
        }
    }

    public class Sample
    {
        [Interceptor]
        public void Method(int test)
        {
            Console.WriteLine("Your Code");
        }
    }
}

[TestMethod]
public void TestMethod2()
{
    Sample t = new Sample();
    t.Method(1);
}