并行语言查询 PLINQ

 public static void ObsoleteMethods(Assembly assembly)
        {
            var query = from type in assembly.GetExportedTypes().AsParallel()

                        from method in type.GetMethods(BindingFlags.Public | BindingFlags.Instance | 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}\nMethod={1}\nMessage={2}\n",
                        type.FullName, method.ToString(), obsoleteAttrObj.Message);
            foreach (var result in query) Console.WriteLine(result);



        }