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SpinWait.SpinUntil Method (Func<Boolean>, TimeSpan)

.NET Framework 4.6 and 4.5

Spins until the specified condition is satisfied or until the specified timeout is expired.

Namespace:  System.Threading
Assemblies:   System.Threading (in System.Threading.dll)
  mscorlib (in mscorlib.dll)

public static bool SpinUntil(
	Func<bool> condition,
	TimeSpan timeout


Type: System.Func<Boolean>

A delegate to be executed over and over until it returns true.

Type: System.TimeSpan

A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

Return Value

Type: System.Boolean
True if the condition is satisfied within the timeout; otherwise, false


The condition argument is null.


timeout is a negative number other than -1 milliseconds, which represents an infinite time-out -or- timeout is greater than MaxValue.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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