Effective C#50 Specific Ways to Improve Your C# Second Edition phần 4 pdf
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Effective C#
50 Specific Ways to Improve
Your C#
Second Edition
Bill Wagner
Upper Saddle River, NJ • Boston • Indianapolis • San Francisco
New York • Toronto • Montreal • London ... 239
Item 41 : Use DynamicObject or IDynamicMetaObjectProvider for
Data-Driven Dynamic Types 243
Item 42 : Understand How to Make Use of the Expression API 2 54
Item 4...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 2 pptx
... Item 45 . For reference types, your instance method needs to follow pre-
defined behavior to avoid strange surprises for users of your class. When-
ever you override Equals(), you’ll want to implement ...
"SomeSample.Size" is not what you want to display to your users. But that’s
what you get when you don’t override ToString() in your classes. You write
a class...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 3 docx
... helper method. Stop that,
too. When you find that multiple constructors contain the same logic, fac-
tor that logic into a common constructor instead. You’ll get the benefits of
Item 14: Minimize ... logic to
initialize static member variables, create a static constructor.
Implementing the singleton pattern in C# is the most frequent use of a
static constructor. Make your instance cons...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 4 pdf
... structure refers to the same array storage (phones) allocated
outside the object. Developers can modify your immutable structure
through another variable that refers to the same storage. To remove ... meant to store data values, value types are the way to go.
The decision to make a value type or a reference type is an important one.
It is a far-reaching change to turn a val...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 6 pptx
... Relational Operators.
public static bool operator <(Customer left,
Customer right)
{
return left.CompareTo(right) < 0;
}
public static bool operator <=(Customer left,
Customer right) ... (!(obj is Customer))
throw new ArgumentException(
"Argument is not a Customer", "obj");
Customer otherCustomer = (Customer)obj;
return this.CompareTo(otherCustomer);
}
#en...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 7 ppt
... rules they might
expect, they need to use casts:
var obj4 = new D();
((B)obj4).Foo(new D2());
obj4.Foo(new B2());
If your API forces this kind of construct on your users, you’ve failed. You
can ... elided.
}
}
This is a problem. Your base class snuck a method underneath your class’s
naming scope. There are two ways to fix this. You could change that
name of your Normalize...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 8 pps
... example showed you how to parse expressions to convert code (or
at least expressions that define code) into data elements you can use to
implement runtime algorithms. The second example shows ... much work to do.
Implementing dynamic behavior can be a great way to approach some of
your programming challenges. When you look at creating dynamic types,
your first choice should be...
Effective C#50 Specific Ways to Improve Your C# 2nd phần 3 pps
... static
constructors are called. And, yes, your static initializers execute before the
base class’s static constructor.
The CLR calls your static constructor automatically before your type is
first ...
that leads to unmaintainable code.
If you want to convert another type into your type, use a constructor. This
more clearly reflects the action of creating a new object. Conversio...
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