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Contract.Exists Method (Int32, Int32, Predicate<Int32>)

Determines whether a specified test is true for any integer within a range of integers.

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

public static bool Exists(
	int fromInclusive,
	int toExclusive,
	Predicate<int> predicate


Type: System.Int32
The first integer to pass to predicate.
Type: System.Int32
One more than the last integer to pass to predicate.
Type: System.Predicate<Int32>
The function to evaluate for any value of the integer in the specified range.

Return Value

Type: System.Boolean
true if predicate returns true for any integer starting from fromInclusive to toExclusive - 1.


predicate is null.


toExclusive is less than fromInclusive.

The toExclusive parameter is one more than the last integer to facilitate using the length of a range of integers starting at 0. For example, it would be set to 5 for integers 0 through 4.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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