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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 ... you. You likely need to attempt to cast those objects
to other types, either classes or interfaces. You’ve got two choices: Use the
as operator or force the compiler to...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 2 pptx
...
"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 once, but your clients use it many times. ...
Object.ToString() should return the textual representation most likely to
be used by clients of that class. In the Customer example, that’s the name:
Item 5: Alway...
Effective C#50 Specific Ways to Improve Your C# Second Edition phần 3 docx
... are, stop it. Veteran C++ programmers would
factor the common algorithms into a private helper method. Stop that,
too. When you find that multiple constructors contain the same logic, fac-
tor ... 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 const...
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
...
testing element: 29
testing element: 30
projecting an element: 30
The query does not begin to execute until the first call to MoveNext() on
the enumerator. The first call to MoveNext() executes ... 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
... 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 to derive ... itself dynamic. At some point, you’ll
want to bring those dynamic objects back into the static type system used
by most of your C# code. That’s going to require either a cast or...
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 ... to be
converted to another type. By contrast, an explicit conversion will be called
only when the programmer puts a cast operator in the source code.
Item 9: Avoid Conversion Oper...