Click here to Skip to main content
Click here to Skip to main content

5 nice things to have in C# 5.0

, 28 Sep 2010
Rate this:
Please Sign up or sign in to vote.
Few new specifications on C# 5.0, a future of C#

C# 4.0 is out with lots of new specs this year. Few of them are really good, like the support of Task level Parallelism, Dynamic behavior of objects, etc. So C# is very rich now in all respects. But this is not the end of everything. We would love to have new things to come up with C#. So let's discuss a few things which I would love to have.

There is already a buzz around on C# 5.0 specifications in forums. A notable discussion around should be some threads like:

etc. These community links are really great where a lot of people voted for new language specs, while quite a few things are already in process like...

Binding Operators

Binding Operators may be C# 5.0. The support for Binding on .NET objects is awesome. I came to know this from Chris on his post where he speaks how Binding operators looked like long ago. The Delphi assignment operator := is now being used for this purpose. :=: would be used for two way binding. Thus:

comboBox1.Text :=: textBox1.Text; 

means there would be two way binding between the properties so that when ComboBox1.Text changes its Text, it will automatically change the value of Textbox1.Text. Binding is actually not a new thing to the system. In WPF, we already have Binding in place, but for that we need the properties to have implemented from INotifyPropertyChanged. So it is not in the language, the WPF objects are doing this internally by handling the PropertyChanged event on the object. But if that is included as an operator, it would be a cool feature to add on.

Support for Dynamic to the Compiler

Another important candidate for C# 5.0 would be the support for dynamic objects to the compiler itself. There are quite a few occasions where we already did face the flavor of Dynamic behavior of object. You can now defer the determination of type for the object to runtime using the keyword dynamic which is a compile time dynamic while runtime static. The introduction of Expression Trees also defers the compilation of an expression at runtime. You can create objects dynamically at runtime using either inheriting from DynamicObject (which is very easy to do) or by using CodeDom to compile a code at runtime and run the code using reflection. But what if these things are supported by the compiler itself.

As pointed out by Magnus in his post, The future of C# 4.0 and then 5.0, he clearly pointed out what the next version of C# would add up. The compiler must be supporting quite a number of APIs which lets you tweak your code to generate and compile the code at runtime.

But these are not the end of C# 5.0. People all around the globe are putting efforts to make a Wishlist on C# 5.0. A few of those might be:

Pavel's Wishlist on C# 5.0 where he specified quite a number of interesting specs on C# 5.0 but will it be all.

Probably if you ask me what would be your own language features which you like to see, I may name quite a few which I miss:

1. Support for parametrized constructors in Generics.

Yes. it would be nice to have this option in. As we have:

public class T MyClass : T: class, new()

//we might have 
public class T MyClass : T:class, new(int)

This might need adjustment to the compiler. I don't know if it is possible or not. But I definitely miss this in C#.

2. Support for WeakDelegate or WeakEvents

WeakReference, as I have discussed already in my blog or you come across it somewhere else, gives you a tweak to GC. It lets you refer to an object weakly while the GC may still collect it in the process. Thomas, rightly identified that WeakDelegate does not work now. You cannot have WeakDelegate defined in your scope.

3. Better treatment for Null

Working with Null has always been a problem for me. We have to treat nulls separately because there is no type associated with Nulls. With the introduction of Nullables around or Null coalesce operators, still there is scope of improving the Null treatment in the language. Say for instance,

int x? = null;
int y? = x + 40;

which results Y to be null. But don't you think there is a scope of betterment here where the nullables might be treated better in case of working with Operations.

Other than that, we could also have ??? operator in place to treat situations like this:

Myobject obj = null;

Myotherobj obj2 = obj.MyProperty ??? new Myotherobj();

It was introduced by Earlz in his post. Really looks nice, huh.

4. Smart Case support

Yes, Switch - Case could allow expressions. While working with it, I miss it very often. Just like what Charles pointed out, I agree with him totally. I would like to have the option to specify:

switch(myobj)
{
   case string.IsNullorEmpty(myotherobj):
                  .....
   case myotherobj.Trim().Lower:
         ....
}

5. Extension properties

Just as we support extension methods, we could also have extension properties which could probably be used from Extension methods only. It is nice to have in certain cases.

[Associate(string)]
public static int MyExtensionProperty { get;set;}

Something like this might come in very handy at times. Probably some other syntax than Attribute Associate would be more fruitful.

Finally, I would like to see your feedback on the topic. Any other things which you miss? You can point them out to me.

Thanks for reading.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Abhishek Sur
Architect
India India
Did you like his post?
 
Oh, lets go a bit further to know him better.
Visit his Website : www.abhisheksur.com to know more about Abhishek.
 
Abhishek also authored a book on .NET 4.5 Features and recommends you to read it, you will learn a lot from it.
http://bit.ly/EXPERTCookBook
 
Basically he is from India, who loves to explore the .NET world. He loves to code and in his leisure you always find him talking about technical stuffs.
 
Presently he is working in WPF, a new foundation to UI development, but mostly he likes to work on architecture and business classes. ASP.NET is one of his strength as well.
Have any problem? Write to him in his Forum.
 
You can also mail him directly to abhi2434@yahoo.com
 
Want a Coder like him for your project?
Drop him a mail to contact@abhisheksur.com
 
Visit His Blog

Dotnet Tricks and Tips



Dont forget to vote or share your comments about his Writing
Follow on   Twitter   Google+

Comments and Discussions

 
GeneralMy vote of 5 PinprofessionalRenju Vinod2-Oct-13 23:08 
QuestionNice to have Pinprofessionaljfriedman31-May-13 20:50 
GeneralMy vote of 5 PinmemberTamil Selvan K19-Jul-12 22:15 
GeneralMy vote of 3 [modified] Pinmemberjfriedman11-Sep-11 8:14 
GeneralOther proposal PinmemberStéphane Issartel13-Oct-10 5:56 
GeneralRe: Other proposal PinmvpAbhishek Sur18-Oct-10 10:33 
GeneralNone of the above PinmemberWebBiscuit8-Oct-10 22:58 
GeneralA Modest Proposal PinmemberLee Robie5-Oct-10 15:51 
GeneralMy vote of 5 PinmemberAnurag Gandhi5-Oct-10 6:57 
GeneralInteresting ideas! PinmemberKubajzz29-Sep-10 2:46 
I really like your first idea: support of parametric constructrs in generic constraints. I agree that it would be a very useful feature.
 
As for the other ideas, many of them are interesting, but most of them are pure nonsenses IMO...
 
For example allowing expressions in switch statements would bring one big problem - more than one case statement could be valid, which would result in ambiguous execution.
 
"Better treatment for Null" sounds good... Null values do sometimes bring problems and you have to write a lot of code to check for nulls, but at least the system is simple and consistent. Changing it would bring more damage than help.

As for extension properties, the only problem is that you need some place to store the actual data. Extension methods are in fact static, so adding an extension method to a class doesn't change the original class. However, adding an extension property would require some additional memory space to be allocated... which is not easy.
 
So, to sum this up, I'm glad people like you are not the designers of C#. None the less, it was a pleasure to read this article and I thank you for the interesting ideas.
GeneralRe: Interesting ideas! PinmvpAbhishek Sur29-Sep-10 11:53 
GeneralRe: Interesting ideas! PinmemberKubajzz30-Sep-10 8:45 
QuestionAOP support? Pinmemberhspc29-Sep-10 0:51 
AnswerRe: AOP support? PinmvpAbhishek Sur29-Sep-10 12:53 
GeneralMy vote of 5 PinmvpNishant Sivakumar28-Sep-10 21:41 
GeneralRe: My vote of 5 PinmvpAbhishek Sur29-Sep-10 11:56 
GeneralAwesome! PinmemberSushant Joshi28-Sep-10 21:08 
GeneralRe: Awesome! PinmemberKubajzz29-Sep-10 2:48 
GeneralRe: Awesome! PinmvpAbhishek Sur29-Sep-10 12:00 
GeneralRe: Awesome! PinmemberSushant Joshi29-Sep-10 17:27 
GeneralMy vote of 5 PinmentorKunalChowdhury28-Sep-10 20:04 
GeneralRe: My vote of 5 PinmvpAbhishek Sur29-Sep-10 11:58 
GeneralCode Formatting Sucked!!! PinmentorKunalChowdhury28-Sep-10 18:35 
GeneralRe: Code Formatting Sucked!!! PinmentorKunalChowdhury28-Sep-10 20:03 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web04 | 2.8.140721.1 | Last Updated 29 Sep 2010
Article Copyright 2010 by Abhishek Sur
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid