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

public static void IsInstanceOfType(
	Object value,
	Type expectedType,
	string message,
	params Object[] parameters
)

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: Object[]

An array of parameters to use when formatting message.

ExceptionCondition
AssertFailedException

value is null or expectedType is not found in the inheritance hierarchy of value.

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