static void Main()

        {

            ObsoleteMethods(Assembly.Load("mscorlib.dll"));

            Console.ReadKey();

        }

        private static void ObsoleteMethods(Assembly assembly)

        {

            var query = from type in assembly.GetExportedTypes().AsParallel()

                        from method in type.GetMethods(BindingFlags.Public | BindingFlags.Static | BindingFlags.Static)

                        let obsoleteAttrType = typeof(ObsoleteAttribute)

                        where Attribute.IsDefined(method, obsoleteAttrType)

                        orderby type.FullName

                        let obsoleteAttrObj = (ObsoleteAttribute)Attribute.GetCustomAttribute(method, obsoleteAttrType)

                        select string.Format("Type={0} \n Mehthod={1} \n Message={2} \n ", type.FullName, method, obsoleteAttrObj.Message);

            foreach (var item in query)

                Console.WriteLine(item);

            //query.ForAll(a => Console.WriteLine(a));    //让多个线程同时调用Console反而损害性能，因为Console在内部进行线程同步

            //query.Distinct().AsOrdered();

            //query.OrderBy(a => a.Length).AsUnordered();

            //query.WithExecutionMode(ParallelExecutionMode.ForceParallelism);

            //query.WithMergeOptions(ParallelMergeOptions.AutoBuffered);

        }