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Contract.ValueAtReturn<T> Method

Represents the final (output) value of an out parameter when returning from a method.

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

public static T ValueAtReturn<T>(
	out T value

Type Parameters


The type of the out parameter.


Type: T%
The out parameter.

Return Value

Type: T
The output value of the out parameter.

This method can be used only in the conditional expression for the Ensures contract. As with the OldValue<T> method, you can omit the generic type parameter whenever the compiler is able to infer its type. The contract rewriter replaces the method call with the value of the out parameter. The ValueAtReturn<T> method may appear only in postconditions. The argument to the method must be an out parameter or a field of a structure out parameter. The latter is also useful when referring to fields in the postcondition of a structure constructor.

.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.