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The custom tool would reflect over all types/methods in the assembly and consume your custom attribute, at which point it could print to System.Console's default or error TextWriters. From the C# standard:- The attribute Obsolete is used to mark types and members of types that should no longer be used. As the OP requests non nullable reference types. –AxelEckenberger Mar 4 '10 at 19:48 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted No, not I know how to create a custom attribute, the question is how do I cause it to generate compiler warnings in visual studio.

You’ll be auto redirected in 1 second. I have 2 constructors in my class. In the United States is racial, ethnic, or national preference an acceptable hiring practice for departments or companies in some situations? Marking obsolete a function of a library L, the obsolete message raises when a program calls the function even if the caller program is not in the library L.

Why do train companies require two hours to deliver your ticket to the machine? Because #error will cause error each and every time. C# Compiler Errors Visual Studio 2015 Other Versions Visual Studio 2013 Visual Studio 2012 Visual Studio 2010 Visual Studio 2008 Visual Studio 2005  Some C# compiler errors have corresponding topics that FYI: System.ObsoleteAttribute is sealed.

This is very close to what you wanted to achieve. Edit: Damn, getting to question after it was heavily edited. Make all the statements true Physically locating the server Why did my electrician put metal plates wherever the stud is drilled through? What I wanted to do is to have the user (developer) of my class have a compile-time error when it supplies null as the value of a parameter when he compiles

I'm going to presumptively retag this as C# (not C) on the presumption that's what the original poster meant to pick. –Onorio Catenacci Sep 30 '08 at 17:33 it's Unsubstantiated If Dumbledore is the most powerful wizard (allegedly), why would he work at a glorified boarding school? Browse other questions tagged c# .net .net-4.0 attributes compiler-errors or ask your own question. if (other == null) { // Throw an exception.

Browse other questions tagged c# compiler-errors or ask your own question. more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation is it possible? As far as I know support for ObsoleteAttribute is essentially hardcoded into the C# compiler; you can't do anything similar directly.

Do you need your password? How can I make LaTeX break the word at the end of line more beautiful? Understand that English isn't everyone's first language so be lenient of bad spelling and grammar. See more: C# .NET Visual-Studio IDE compiler , + I don't think this is possible, but I have always hoped it is.

Does chilli get milder with cooking? I know that if I say int myInt = "5"; I get a compile time error. I would suggest you write unit tests to detect this (iterate over all the types in the assembly, and check that the attribute has only been applied at most once per Well, then given your new information, I'd say that throwing an exception at runtime is a better option. –Matt Jun 7 '11 at 13:58 @m-y as @Matt pointed, it

How to show hidden files in Nautilus 3.20.3 Ubuntu 16.10? share|improve this answer answered Sep 30 '08 at 17:59 technophile 2,59011119 add a comment| up vote 0 down vote There are several comments that suggest to insert warnings or pragma. After I posted the question I realized that perhaps I should give more information as a sort of a "... Is there a way to do this?

throw new ArgumentNullException(); } } } Hope this helps. -- - Nicholas Paldino [.NET/C# MVP] - mv*@spam.guard.caspershouse.com "ThunderMusic"

Let's work to help developers, not make them feel stupid. With the passing of Thai King Bhumibol, are there any customs/etiquette as a traveler I should be aware of? When you apply [Obsolete("You really shouldn't use this anymore.")] to a member, it causes the compiler to generate a warning or error, which then appears in the Error List in Visual share|improve this answer edited Jul 10 at 6:40 answered Jun 7 '11 at 13:39 Jon Skeet 901k48765347460 1 Yep.

BillWoodruff 5-Dec-13 20:02pm +5 Valuable information that had ... If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. share|improve this answer answered Sep 30 '08 at 18:20 ljs 20.9k2792118 11 I'm looking for the same thing. Why must the speed of light be the universal speed limit for all the fundamental forces of nature?

Your Email This email is in use. creating a compile time error... I want to write a custom attribute that I can use to mark methods or properties that will generate compiler warnings that give messages that I write. Something like: ///

[Experimental] This method does something magical</summary> public void MyMethod() { } Yvan Rodrigues 5-Dec-13 10:29am nice tip!

The transformation T on the set of all continuous functions that is defined by T(f) = f (1) is a linear transformation. I was looking to do the same thing, and ended up just throwing NotImplementedExceptions. It would be more of a development time attribute. thanks ThunderMusic "Nicholas Paldino [.NET/C# MVP]"

However, I would still personally prefer unit tests for this, as then the code could be built and tested by anyone, regardless of whether they had the Roslyn analyzer installed. share|improve this answer answered Mar 4 '10 at 19:45 AxelEckenberger 11.9k13257 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign