Name
Debug.Assert Method
Class
System.Diagnostics.Debug
Syntax
Debug
.Assert(booleanexpression[[, string1], string2]
)
-
booleanexpression
Use: Required
Data Type: Boolean
Expression that evaluates to a Boolean value.
-
string1
Use: Required
Data Type: String
String to output if
booleanexpression
isFalse
.-
string2
Use: Required
Data Type: String
Detailed string to output. If
booleanexpression
isFalse
,string2
is output to Output window.
Return Value
None
Description
Outputs messages to the Output window if the condition is
False
Rules at a Glance
booleanexpression
must evaluate to a
Boolean value.
Programming Tips and Gotchas
Assert is typically used when debugging to test an expression that should evaluate to
True
.Debug.Assert executes only when an application is run in the design-time environment; the statement has no effect in a compiled application. This means that Debug.Assert will never produce a runtime error if the call to it is inappropriate, nor will it suspend program execution outside of the VB IDE. Because of this, you do not have to remove Debug.Assert statements from finished code or separate them with conditional
#If...Then
statements.
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