| .gif) | AspNetDevelopmentServer | Represents the settings for an instance of the ASP.NET Development Server. More than one instance may occur during a test. | 
| .gif) | CollectorDataEntry | Infrastructure. Represents a data entry from a diagnostic data adapter. | 
| .gif) | ComputerInfo | Obsolete. Provides information about the computer that sent a TestResultMessage. This class is obsolete. | 
| .gif) | DataCollectorExceptionMessageInfo | Represents information about an exception that is reported by a diagnostic data collector. | 
| .gif) | DataCollectorMessageInfo | Represents an error message or warning message for diagnostic data adapters. | 
| .gif) | DebugOperationResult | Represents the results of a debug operation. | 
| .gif) | DebugRequestMessage | Represents a request from a test adapter or host adapter for a debug test operation. | 
| .gif) | DebugTargetInfo | Provides information about a debug target. | 
| .gif) | DeploymentItem | Represents a file, a directory, or another item to be deployed with a test run. | 
| .gif) | DeploymentItemCollection | A collection of DeploymentItem objects. | 
| .gif) | EqtBaseCollection<T> | Provides a base class for collections in this namespace. | 
| .gif) | EqtTextWriterTraceListener | Opens a shared log file in append mode. | 
| .gif) | GroupingPropertyAttribute | Represents the attribute that marks a property as a grouping property. | 
| .gif) | HostRunConfigurationData | Infrastructure. Encapsulates test run configuration data about both the current active host and storage for configuration settings for all hosts. | 
| .gif) | KnownExecutionAppKeys | No content here will be updated; please do not add material here. | 
| .gif) | Link | Represents a link to a test object or to a file on the server in Visual Studio Test Professional. | 
| .gif) | LocalizedDescriptionAttribute | Infrastructure. Represents the attribute that enables the localization of a property description. This class cannot be inherited. | 
| .gif) | NameValue | Represents a named text value. | 
| .gif) | NonPersistableAttribute | Represents a marker attribute for a field that indicates that it must not be persisted. | 
| .gif) | PersistenceElementNameAttribute | Represents an attribute that provides an element name for persisting an element to XML. | 
| .gif) | ProjectData | Represents information about a test project in Visual Studio. | 
| .gif) | PropertyWindowAttribute | Represents an attribute for a property that indicates whether the property will appear in the property window. | 
| .gif) | PublishInfo | Infrastructure. Represents internal information about publishing test results. | 
| .gif) | QTMeasurementBlockFactory |  | 
| .gif) | RunInfo | Represents information about the execution of a test run. | 
| .gif) | RunOutputTestResultMessage | Collects standard output, standard error, and trace data about a test run for diagnostic data adapters to report to the user. | 
| .gif) | RunResultAndStatistics | Represents a test result that is used to keep statistics at the test run level. | 
| .gif) | RunStateEvent | Represents a request to change the state of a test run. | 
| .gif) | SessionId | Represents an identifier for a test session. This class cannot be inherited. | 
| .gif) | TcmContext | No content here will be updated; please do not add material here. | 
| .gif) | TcmInformation | Infrastructure. Encapsulates the information about a test that is stored in the test case management server. | 
| .gif) | TestAggregation | Represents an aggregation of test elements and links. | 
| .gif) | TestAndCategoryPair | Represents a match between a test and a test category that is used by the Test List Editor window of Visual Studio Test Professional. | 
| .gif) | TestCaseManagementDisplayNameAttribute | Represents an attribute that can be applied to test element properties that enables the Visual Studio Test Professional user interface to localize property names. This class cannot be inherited. | 
| .gif) | TestCategoryItem | Represents a category for a test. | 
| .gif) | TestCategoryItemCollection | Represents a collection of strings that categorize a test. | 
| .gif) | TestElement | Provides a base class for all tests. | 
| .gif) | TestExecId | Represents a unique ID for a test in a test run. This class cannot be inherited. | 
| .gif) | TestExecutionTraceInformation | Encapsulates the trace information when an error occurs during test execution. This class cannot be inherited. | 
| .gif) | TestId | Represents a unique ID for a test. | 
| .gif) | TestListCategoryId | Identifies a specific list of tests in the Test List Editor window of Microsoft Visual Studio Test Professional 2010 and provides access to the IDs of the predefined test lists. | 
| .gif) | TestMessage | Represents a base class for messages that are passed between client, controller, and agents. | 
| .gif) | TestOutcomeHelper | Infrastructure. Provides helper methods for test outcomes. | 
| .gif) | TestResult | Represents a base class for test results and represents the results of a test. | 
| .gif) | TestResultAggregation | Represents a test result that has aggregated information from all test results in the associated test run. | 
| .gif) | TestResultBase | Provides an optional base class for a custom test result class. | 
| .gif) | TestResultCounter | Provides functionality to persist the counts of the outcomes of test cases in a test aggregation. | 
| .gif) | TestResultDetail | Represents the detailed information for a test result. | 
| .gif) | TestResultErrorInfo | Represents an error or warning message that was encountered during a test run and included in the test result. | 
| .gif) | TestResultId | Represents a unique identifier for a test result. | 
| .gif) | TestResultMessage | Provides a base class for test results. | 
| .gif) | TestRun | Provides a snapshot of a test job that was taken when it was executed. This class cannot be inherited. | 
| .gif) | TestRunConfiguration | No content here will be updated; please do not add material here. | 
| .gif) | TestRunConfigurationId | Represents an identifier for a test run configuration object. | 
| .gif) | TestRunEventArgs | Represents the base class for test run event arguments. | 
| .gif) | TestRunTextResultMessage | Represents text information to report extra information that is provided by the user and added to the test result. | 
| .gif) | TestStateEvent | Represents a notification record for a change in test state. | 
| .gif) | TestType | Identifies a type of test. | 
| .gif) | TestTypeExtensionClientSide | Provides a base class for custom test extensions to work on the client. | 
| .gif) | TextTestResultMessage | Provides a message that is used by tests to report additional information that the user wants to see in the result. | 
| .gif) | TimerResult | Records the result of a timer that a test writer may use to execute a part of a test. | 
| .gif) | Tip | Represents the default implementation of a test item provider that must be implemented for each type of test. | 
| .gif) | UriDataAttachment | Provides an implementation of IDataAttachment for sending any resource that can be accessed by a uniform resource identifier (URI) as an attachment. | 
| .gif) | UserVisiblePropertyAttribute | Represents an attribute that can be applied to a property of a test element to make the property visible in the property window of the Visual Studio Test Professional user interface. This class cannot be inherited. | 
| .gif) | VisiblePropertyAttribute | Represents an attribute that is applied to a property of a test element that marks a property as a grouping property in the property window of the Visual Studio Test Professional user interface. | 
| .gif) | WarningEventArgs | Represents the event arguments for a warning that occurred during a test execution. | 
| .gif) | XmlTestReader | Provides XML reading functionality in Visual Studio Test Professional. | 
| .gif) | XmlTestWriter | Provides XML writing functionality in Visual Studio Test Professional. |