Random.NextBytes Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Fills the elements of a specified array of bytes with random numbers.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- buffer
- Type:
System.Byte
[]
An array of bytes to contain random numbers.
| Exception | Condition |
|---|---|
| ArgumentNullException | buffer is null. |
Each element of the array of bytes is set to a random number greater than or equal to zero, and less than or equal to MaxValue.
To generate a cryptographically secured random number suitable for creating a random password, for example, use a method such as RNGCryptoServiceProvider.GetBytes.
Notes to InheritorsIf you derive a class from Random and override the Sample method, the distribution provided by the derived class implementation of the Sample method is not used in calls to the base class implementation of the NextBytes method. Instead, the uniform distribution returned by the base Random class is used. This behavior improves the overall performance of the Random class. To modify this behavior to call the Sample method in the derived class, you must also override the NextBytes method.