Expand Minimize

ThreadPriorityLevel Enumeration

Specifies the priority level of a thread.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

public enum ThreadPriorityLevel

Member nameDescription
IdleSpecifies idle priority. This is the lowest possible priority value of all threads, independent of the value of the associated ProcessPriorityClass.
LowestSpecifies lowest priority. This is two steps below the normal priority for the associated ProcessPriorityClass.
BelowNormalSpecifies one step below the normal priority for the associated ProcessPriorityClass.
NormalSpecifies normal priority for the associated ProcessPriorityClass.
AboveNormalSpecifies one step above the normal priority for the associated ProcessPriorityClass.
HighestSpecifies highest priority. This is two steps above the normal priority for the associated ProcessPriorityClass.
TimeCriticalSpecifies time-critical priority. This is the highest priority of all threads, independent of the value of the associated ProcessPriorityClass.

Every thread has a base-priority level determined by the thread's priority value and the priority class of its process. The operating system uses the base-priority level of all executable threads to determine which thread gets the next slice of processor time.

The priority level is not an absolute value, but instead is a range of priority values. The operating system computes the priority by using the process priority class to determine where, in the range specified by the PriorityLevel property, to set the thread's priority.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft