Best Practices in framework 2.0

Best Practices in framework 2.0

1)    The runtime optimizes the performance of 32-bit integer types (Int32 and UInt32), so use those types for counters and other frequently accessed integral variables.

2)    For floating-point operations, Double is the most efficient type because those operations are optimized by hardware.

3)    Garbage collection occurs only when needed or when triggered by a call to GC.Collect. Automatic garbage collection is optimized for applications where most instances are short-lived, except for those allocated at the beginning of the application. Following that design pattern will result in the best performance.

string s;

s = "wombat"; // "wombat"

s += " kangaroo"; // "wombat kangaroo"

s += " wallaby"; // "wombat kangaroo wallaby"

s += " koala"; // "wombat kangaroo wallaby koala"

Console.WriteLine(s);

Only the last string has a reference; the other three will be disposed of during garbage collection. Avoiding these types of temporary strings helps avoid unnecessary garbage collection, which improves performance. There are several ways to avoid temporary strings:

BEST PRACTICES Boxing and unboxing

Boxing and unboxing incur overhead, so you should avoid them when programming intensely repetitive tasks. Boxing also occurs when you call virtual methods that a structure inherits from System.Object, such as ToString.

Follow these tips to avoid unnecessary boxing:

4)    Implement type-specific versions (overloads) for procedures that accept various value types. It is better practice to create several overloaded procedures than one that accepts an Object argument.

5)    Use generics whenever possible instead of accepting Object arguments.

6)    Override the ToString, Equals, and GetHash virtual members when defining structures.

Regular Expression

7)    When validating input, always begin regular expressions with a “^” character and end them with “$”. This system ensures that input exactly matches the specified regular expression and does not merely contain matching input.