Debug.Assert Method

Debug.Assert Method

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Class

System.Diagnostics.Debug

Syntax

     Debug.Assert(booleanExpression[, string1[, string2]]) 

booleanExpression (required; Boolean)

Expression that evaluates to a Boolean value

string1 (optional; String)

String to output if booleanExpression is False

string2 (optional; String)

Additional detail text to output if booleanExpression is False

Description

The Assert method outputs messages to the debug listeners if a condition fails.

Usage at a Glance

• Assert is typically used to test an expression that should evaluate to true.

• The Debug class features only work in the design-time environment; the statement has no effect in a compiled application. You do not have to remove Debug-related features from your code before release.

• If neither string is supplied, the current call stack is output on failure.

Version Differences

The .NET Assert method is similar to the VB 6 method of the same name, except that the .NET version displays a message if an expression is False, while the VB 6 version suspends program execution.

See Also

Debug Class