Contract.Assert Method (Boolean, String)
Checks for a condition; if the condition is false, follows the escalation policy set by the analyzer and displays the specified message.
Assemblies: mscorlib (in mscorlib.dll)
System.Diagnostics.Contracts (in System.Diagnostics.Contracts.dll)
'Declaration <ConditionalAttribute("DEBUG")> _ <ConditionalAttribute("CONTRACTS_FULL")> _ Public Shared Sub Assert ( _ condition As Boolean, _ userMessage As String _ )
The default escalation policy is to notify the attached debugger about a contract failure or to display an Assert dialog box if a debugger is not attached. Optionally, the analyzer can be instructed to throw an exception. The userMessage parameter is passed to the debugger output. If userMessage is not a constant string literal, tools may not be able to read it.