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C# Precisely by Peter Sestoft

By Peter Sestoft

C# is an object-oriented programming language that's just like the Java programming language in lots of respects yet extra finished and varied in so much info. This booklet offers a concise description of C#. it really is meant as a consultant for readers who understand Java and wish to profit C# and as a short reference for someone who desires to be aware of C# in additional aspect than that supplied through a regular textbook. the ultimate bankruptcy of C# accurately summarizes the variations among C# and Java.C# accurately is without doubt one of the first books on C# to hide model 2.0. It provides the complete C# 2.0 programming language, together with generics, iterators, and nameless equipment. It excludes lots of the huge Microsoft.NET framework category libraries other than threads, input/output, and regularly occurring assortment periods. The publication exhibits common principles on left-hand pages, with corresponding examples on right-hand pages. All examples are fragments of felony C# courses. the entire, ready-to-run instance courses are to be had on the book's website.

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Math. 3 Member Access Modifiers private, protected, internal, public A member (data, function, or type) is always accessible in the class in which it is declared, except where shadowed by a variable or parameter of a function member, or by a member of a nested class or struct. The following access modifiers may be used to make the member accessible elsewhere. The following access modifiers are legal (in a class declaration C or a struct type declaration S): Member Access Modifier private or absent internal protected protected internal public Accessible Within This class or struct This assembly This class + its subclasses This assembly + this class’s subclasses Everywhere In CS CS CCCS private protected internal protected internal public The modifiers protected and protected internal can be used on members of a class but not on members of a struct type (section 14) because it cannot have subtypes.

14. Static code cannot refer to instance members or to this, only to static members. Most of what is said about class declarations in this section is true of struct type declarations also, with the modifications listed in section 14. Classes 33 Example 40 Class Declaration The Point class is declared to have two instance fields x and y, one constructor, and two instance methods. It is used in examples 21 and 64. y = y; } public void Move(int dx, int dy) { x += dx; y += dy; } public override String ToString() { return "(" + x + ", " + y + ")"; } } Example 41 Class with Static and Instance Members The APoint class declares a static field allpoints and two instance fields x and y.

F, or, in the declaration of C and C’s subclasses, as f. If a field f in class C is not declared static, then f is an instance field associated with an object of class C, and every object has its own instance of the field. f where o is an expression of type C, or, in non-static code inside the declaration of C and C’s subclasses, as f. If a field f is declared readonly, then the field can be assigned only by its initializer expression and in constructors (possibly multiple times). It cannot be assigned elsewhere, nor be passed as an out or ref parameter.

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