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Download C# Class Design Handbook: Coding Effective Classes by Richard Conway PDF

By Richard Conway

This booklet is a smart instance of the standard literature one expects from Apress. It delves into subject matters coated in so much books on C#, yet with a watch strictly towards type layout and performance. The authors have performed a superb task and the booklet reads as though it used to be written by way of one voice rather than 5. A needs to learn for all rookies.

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Extra info for C# Class Design Handbook: Coding Effective Classes

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As in C++ and Java, arrays in C# are declared using the [] syntax: // one-dimensional array int[] oneDee = new int[10]; // two-dimensional rectangular array int[,] twoDee = new int[10, 5]; // jagged array int[][] jaggy = new int[3][]; jaggy[0] = new int[5]; jaggy[1] = new int[10]; jaggy[2] = new int[20]; Note that unlike with C++ the [] must always follow the type name, not the variable name. This is the same as the syntax used most commonly in Java. Also note that an array must be initialized using the new operator, because it is a reference type.

You don't see this relationship in the source code but it's obvious if you look at the MSIL with the IL disassembler. For example, here's the first sample application we coded at the beginning of this section: Java doesn't have an enumeration construct. Java developers commonly use a class as the type, and various static instances of the class as the variable. If we observe the ILDasm output above we can see that an enumeration in C# isn't really a new idea, it's just a shorthand method for creating a specialized value type that provides certain limited but well defined behaviors.

We've also defined our constants as public. If a constant is only needed within the current class, then it is perfectly fine to declare the constant as private instead. We will cover other access modifiers later in the chapter. The actual value of a constant is determined at compile time. When the code is compiled from C# into MSIL, the compiler will insert the constant's value in the resulting executable's metadata. One of the strong points of using constants, aside from tidying up code, is that inserting the constant value directly into the metadata does not require memory allocation.

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