Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Contract::Ensures Method (Boolean, String^)

 

Specifies a postcondition contract for a provided exit condition and a message to display if the condition is false.

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

public:
[ConditionalAttribute("CONTRACTS_FULL")]
static void Ensures(
	bool condition,
	String^ userMessage
)

Parameters

condition
Type: System::Boolean

The conditional expression to test. The expression may include OldValue<T> and Result<T> values.

userMessage
Type: System::String^

The message to display if the expression is not true.

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.

  • This contract is exposed to clients; therefore, it must only reference members that are at least as visible as the enclosing method.

  • You must use the binary rewriter (available at Code Contracts on the MSDN DevLabs Web site) for run-time enforcement of this postcondition.

  • If userMessage is not a constant string literal, the contract may not be understood by tools.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Return to top
Show:
© 2017 Microsoft