C# 0 The Complete Reference

GC

. However, in 

specialized cases, they can be very useful. For example, you might want to use 

Collect( )

 to 

force garbage collection to occur at a time of your choosing. Normally, garbage collection 

occurs at times unspecified by your program. Since garbage collection takes time, you might 

not want it to occur during some time-critical task, or you might want to take advantage of 

idle time to perform garbage collection and other types of “housekeeping” chores.

Method

Meaning

public vir tual int Next( )

Returns the next random integer, which will be 

between 0 and 

Int32.MaxValue

–1, inclusive.

public vir tual int Next(int 

upperBound

)

Returns the next random integer that is between 0 

and

upperBound

–1, inclusive.

public vir tual int Next(int 

lowerBound

,

                                int 

upperBound

)

Returns the next random integer that is between 

lowerBound

 and 

upperBound

–1, inclusive.

public vir tual void NextBytes(byte[ ] 

buf

)

Fills 

buf

 with a sequence of random integers. 

Each byte in the array will be between 0 and 

Byte.MaxValue–1

, inclusive.

public vir tual double NextDouble( )

Returns the next random value from the sequence 

represented as a floating-point number that is greater 

than or equal to 0.0 and less than 1.0.

protected vir tual double Sample( )

Returns the next random value from the sequence 

represented as a floating-point number that is greater 

than or equal to 0.0 and less than 1.0. To create 

a skewed or specialized distribution, override this 

method in a derived class.

T

ABLE

 21-14 

Methods Defi ned by 

Random

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There are two methods that are especially important if you have unmanaged code in 

your project: