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Assert.IsInstanceOfType Method (Object, Type, String, array<Object )

Verifies that the specified object is an instance of the specified type. The assertion fails if the type is not found in the inheritance hierarchy of the object. Displays a message if the assertion fails, and applies the specified formatting to it.

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

Syntax

'Declaration
Public Shared Sub IsInstanceOfType ( _
    value As Object, _
    expectedType As Type, _
    message As String, _
    ParamArray parameters As Object() _
)
public static void IsInstanceOfType(
    Object value,
    Type expectedType,
    string message,
    params Object[] parameters
)
public:
static void IsInstanceOfType(
    Object^ value, 
    Type^ expectedType, 
    String^ message, 
    ... array<Object^>^ parameters
)
static member IsInstanceOfType : 
        value:Object * 
        expectedType:Type * 
        message:string * 
        parameters:Object[] -> unit
public static function IsInstanceOfType(
    value : Object, 
    expectedType : Type, 
    message : String, 
    ... parameters : Object[]
)

Parameters

  • value
    Type: Object

    The object to verify is of expectedType.

  • expectedType
    Type: Type

    The type expected to be found in the inheritance hierarchy of value.

  • message
    Type: String

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

  • parameters
    Type: array<Object[]

    An array of parameters to use when formatting message.

Exceptions

Exception Condition
AssertFailedException

value is nulla null reference (Nothing in Visual Basic) or expectedType is not found in the inheritance hierarchy of value.

.NET Framework Security

See Also

Reference

Assert Class

IsInstanceOfType Overload

Microsoft.VisualStudio.TestTools.UnitTesting Namespace

Other Resources

Using the Assert Classes