Contract.Ensures Method (Boolean)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Specifies a postcondition contract for the enclosing method or property.
Assembly: mscorlib (in mscorlib.dll)
'Declaration <ConditionalAttribute("CONTRACTS_FULL")> _ Public Shared Sub Ensures ( _ condition As Boolean _ )
Parameters
- condition
- Type: System.Boolean
The conditional expression to test. The expression may include OldValue(Of T), ValueAtReturn(Of T), and Result(Of T) values.
The condition parameter specifies a postcondition that is expected to be true when the enclosing method or property returns normally.
This method call must be at the beginning of a method or property, before any other code.
You must use the binary rewriter (available at Code Contracts on the MSDN DevLabs Web site) for run-time enforcement of this postcondition.
The following example shows how to use the Ensures method to ensure that an expected value is returned. This code example is part of a larger example provided for the ContractClassAttribute class.