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Wrong compiler warning? Or Not?

This piece of code results in a warning. 1: class Test 2: { 3: public static void Main() 4: { 5: object obj = "Senthil" ; 6: string myName = "Senthil" ; 7: Console.WriteLine(obj == myName); 8: } 9: } The compiler says “warning CS0252: Possible unintended reference comparison; to get...

Posted to the blog => anything goes by Senthil on Mon, Nov 30 2009
Filed under: Filed under: software, C# 3.0, C#
Anonymous methods as event handlers – Part 2

The previous post discussed having anonymous methods as event handlers and ended with a question – why doesn’t unsubscription work while subscription works out alright? Vivek got the answer spot on – the way the C# compiler handles and translates anonymous methods is the reason. Here’s the code involved...

Posted to the blog => anything goes by Senthil on Wed, Sep 9 2009
Filed under: Filed under: software, C# 3.0, C#, CodeProject
Anonymous methods as event handlers – Part 1

The syntactic sugar offered by anonymous methods makes them great candidates for writing event handlers; together with smart type inference, they reduce the amount of code written by an order of magnitude. And that’s without considering the power offered by closures. With event handlers, closures allow...

Posted to the blog => anything goes by Senthil on Tue, Sep 1 2009
Filed under: Filed under: software, C# 3.0, C#, CodeProject
Remoting IEnumerables

You're writing this really cool and innovative class to calculate the first hundred thousand natural numbers. You think about the API, and you realize that returning an array of the numbers a) might take a long time to complete, and b) is going to cause memory usage to spike up like mad. So you decide...

Posted to the blog => anything goes by Senthil on Sat, Aug 29 2009
Filed under: Filed under: software, C# 3.0, C#
Overload resolution and null

My colleague Soundar discovered this rather interesting behavior. 1: class Test 2: { 3: public static void Main() 4: { 5: Test test = null ; 6: 7: Console.WriteLine(" {0} ", test); 8: Console.WriteLine(" {0} ", null ); 9: } 10: } If you run this code, you’ll find that while line 7...

Posted to the blog => anything goes by Senthil on Wed, Jul 8 2009
Filed under: Filed under: software, C# 3.0, C#
Volatile and local

If you’ve done any multithreading programming at all, you must be aware of the volatile modifier. When a field is marked volatile, it tells 1. the JIT compiler that it can’t hoist the field because it may be modified by multiple threads 2. the CLR that the field must be read to and written from with...

Posted to the blog => anything goes by Senthil on Fri, Jul 3 2009
Filed under: Filed under: C# 3.0, C#
Mutating value types – Part 1

Take a look at the following short snippet of code. 1: using System; 2: 3: struct S 4: { 5: public int X; 6: } 7: 8: class C 9: { 10: /* More code here */ 11: } 12: 13: class Test 14: { 15: public static void Main() 16: { 17: C c = new C(); 18: c.S.X = 1; 19: } 20: } Without knowing the type definition...

Posted to the blog => anything goes by Senthil on Thu, May 21 2009
Filed under: Filed under: software, C# 3.0, C#
DevTeach 2009 Vancouver

The schedule for DevTeach 2009 Vancouver has been announced ( http://www.devteach.com/ ). There’s lots of great software development sessions from some of the leaders in our industry. If you’re planning on improving yourself, this is the conference to go to. Not only can you attend excellent...

Posted to Peter Ritchie's MVP Blog by PeterRitchie on Thu, Mar 26 2009
Filed under: Filed under: C#, .NET Development, Software Development, Visual Studio 2005, .NET 2.0, Design/Coding Guidance, .NET 3.x, Visual Studio 2008, C# 3.0, .NET 3.5, DevTeach, DDD, Software Development Practices, Software Development Guidance
Confusion++

I'll bet a hundred bucks that any entry level C++ interview or exam will somehow drift into questions about the pre and post increment operators. It's almost become a canonical, rite of passage sort of thing. Now using the operators is one thing, overloading them for your own types is another...

Posted to the blog => anything goes by Senthil on Thu, Feb 26 2009
Filed under: Filed under: software C# language, C# 3.0, C#
Nested Types

Recently Michael Features blogged about nested types . The title was almost "nested types considered harmful". I don't agree. I don't agree that they're any more harmful than any other C# construct (except goto...). Nested types are like anything else in our tool-belt: they have...

Posted to Peter Ritchie's MVP Blog by PeterRitchie on Tue, Jul 15 2008
Filed under: Filed under: C#, .NET Development, Software Development, Design/Coding Guidance, Visual Studio 2008, C# 3.0, .NET 3.5, TCP, Asynchronous Programming Model (APM)
Visual C# Developer Center Article

My latest Visual C# Developer Center Article Inferred Typing with Factory Methods as Extension Methods is now online.

Posted to Peter Ritchie's MVP Blog by PeterRitchie on Thu, Jan 3 2008
Filed under: Filed under: C#, .NET Development, C# 3.0, .NET 3.5
New warning CS0809 in C# 3 (Visual Studio 2008)

There were several breaking changes (fixes) in C# 3 from C# 2. One is the ability to attribute a member override with ObsoleteAttribute without also attributing it the virtual member in the base class. For example, the following will compile without error In C# 2 (Visual Studio 2005/.NET 2.0): using...

Posted to Peter Ritchie's MVP Blog by PeterRitchie on Mon, Nov 26 2007
Filed under: Filed under: C#, Design/Coding Guidance, Visual Studio 2008, C# 3.0, .NET 3.5, C# 3.0 Breaking Changes

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