Contract.Requires Method (Boolean)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Specifies a precondition contract for the enclosing method or property.

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

Syntax

'Declaration
<ConditionalAttribute("CONTRACTS_FULL")> _
Public Shared Sub Requires ( _
    condition As Boolean _
)

[ConditionalAttribute("CONTRACTS_FULL")]
public static void Requires(
    bool condition
)

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.
Use this method instead of the Contract.Requires<TException>(Boolean) method when backward compatibility does not force you to throw a particular exception.

Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.