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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
)

Parameters

Remarks

  • 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.

Version Information

Silverlight

Supported in: 5, 4

Platforms

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