Assert.IsNull Method (Object, String)

Verifies that the specified object is nulla null reference (Nothing in Visual Basic). The assertion fails if it is not nulla null reference (Nothing in Visual Basic). Displays a message if the assertion fails.

Namespace: Microsoft.VisualStudio.TestTools.UnitTesting
Assembly: Microsoft.VisualStudio.QualityTools.UnitTestFramework (in Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll)

Syntax

'Declaration
Public Shared Sub IsNull ( _
    value As Object, _
    message As String _
)
public static void IsNull(
    Object value,
    string message
)
public:
static void IsNull(
    Object^ value, 
    String^ message
)
static member IsNull : 
        value:Object * 
        message:string -> unit
public static function IsNull(
    value : Object, 
    message : String
)

Parameters

  • value
    Type: Object

    The object to verify is nulla null reference (Nothing in Visual Basic).

  • message
    Type: String

    A message to display if the assertion fails. This message can be seen in the unit test results.

Exceptions

Exception Condition
AssertFailedException

value is not nulla null reference (Nothing in Visual Basic).

.NET Framework Security

See Also

Reference

Assert Class

IsNull Overload

Microsoft.VisualStudio.TestTools.UnitTesting Namespace

Other Resources

Using the Assert Classes