Contract.Requires<TException> Method (Boolean)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Specifies a precondition contract for the enclosing method or property, and throws an exception if the condition for the contract fails.
Namespace: System.Diagnostics.Contracts
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Sub Requires(Of TException As Exception) ( _
condition As Boolean _
)
public static void Requires<TException>(
bool condition
)
where TException : Exception
Type Parameters
- TException
The exception to throw if the condition is false.
Parameters
- condition
Type: System.Boolean
The conditional expression to test.
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(Boolean) method when you want to throw an exception if the precondition fails.
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.