By Venkat Subramaniam
Like most complicated projects, .NET programming is fraught withpotential expensive, and time-consuming dangers. The millionsof Microsoft builders around the globe who create applicationsfor the .NET platform can attest to that. fortunately there'snow a booklet that exhibits you the way to prevent such high priced andtime-consuming error. it really is known as .NET Gotchas.The final consultant for effective, pain-free coding, .NETGotchas from O'Reilly comprises seventy five universal .NET programmingpitfalls-and recommendation on tips to paintings round them. It willhelp you steer clear of these blunders that causeapplication functionality difficulties, or so taint code that itjust does not paintings right.The e-book is equipped into 9 chapters, every one focusing onthose positive factors and constructs of the .NET platform thatconsistently baffle builders. inside every one bankruptcy areseveral "gotchas," with special examples, discussions, andguidelines for heading off them. doubtless approximately it, whenapplied, those concise displays of most sensible practices willhelp you lead a extra efficient, enjoyable existence.What's extra, simply because code examples are written in bothVB.NET and C#, .NET Gotchas is of curiosity to greater than 75percent of the transforming into numbers of .NET programmers. So ifyou're a .NET developer who is mired within the trenches andyearning for a greater method, this e-book is almost certainly foryou.
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Native C++ presents the regulate essential to optimize such platforms so i wished to prevent the slower . NET.
I began studying MFC given that that's what we presently use in-house, yet came across that MFC GUI programming isn't intuitive at all.
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(Using identify C++ for . web programming (C++/CLI) makes issues confusing)
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Extra info for .NET Gotachas
Figure 2-5. Exception. Now let's reverse the order of the catch blocks as shown in Example 2-6. Example 2-6. WriteLine("Caught Exception") End Try End Sub End Module The program now produces the desired output, as shown in Figure 2-6. Figure 2-6. NET code, you have to pay attention to the order of your catch blocks. The runtime is going to find the first matching type for a catch. If the base type appears before the derived type, even though a more specific type appears later in the catch sequence, the base type will handle the exception.
Or code the catch for E1 before the catch for E2? 62 63 The C# compiler tries to help by giving you a compilation error if you place them in the wrong order. NET, you are in for a surprise. Consider Example 2-5. Example 2-5. WriteLine("Caught Exception"); } catch(ApplicationException ae) // Results in compilation error. Exception'). NET does not report an error (it does not even report a warning). NET version of the code produces the output in Figure 2-5. Figure 2-5. Exception. Now let's reverse the order of the catch blocks as shown in Example 2-6.
NET version of Example 1-18 That is interesting! NET? The answer is in the translation of source to MSIL. NET. Example 1-19 shows what MSIL command is generated from the C# code for unboxing. Double. Example 1-19. NET produces. VisualBasic namespace. This method silently converts the Integer to Double, so you get the correct answer rather than an exception. 46 47 Example 1-20. NET code to add a Char instead of an Integer, you will get an exception. Let's take a look at this in Example 1-21. Example 1-21.
.NET Gotachas by Venkat Subramaniam