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ServiceHost Class
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ServiceHost Class

Provides a host for services.

Namespace:  System.ServiceModel
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

public class ServiceHost : ServiceHostBase

Implements the host used by the Windows Communication Foundation (WCF) service model programming model.

Use the ServiceHost class to configure and expose a service for use by client applications when you are not using Internet Information Services (IIS) or Windows Activation Services (WAS) to expose a service. Both IIS and WAS interact with a ServiceHost object on your behalf.

To expose a service for use by callers, WCF requires a complete service description (represented by the ServiceDescription class). The ServiceHost class creates a ServiceDescription from the service type and configuration information and then uses that description to create ChannelDispatcher objects for each endpoint in the description.

Use a ServiceHost object to load a service, configure endpoints, apply security settings, and start listeners to handle incoming requests.

    // Host the service within this EXE console application. 
    public static void Main()
      // Create a ServiceHost for the CalculatorService type and use 
      // the base address from config.
      ServiceHost hostDefault = new 

      TimeSpan closeTimeout = hostDefault.CloseTimeout;

      TimeSpan openTimeout = hostDefault.OpenTimeout;

      ServiceAuthorizationBehavior authorization =

      ServiceCredentials credentials =

      ServiceDescription description = 

      int manualFlowControlLimit = 

      NetTcpBinding portsharingBinding = new NetTcpBinding();
	typeof( CalculatorService ),
	"net.tcp://localhost/MyService" );

      int newLimit = hostDefault.IncrementManualFlowControlLimit(100);

      using (ServiceHost serviceHost = new ServiceHost(typeof(CalculatorService)))
          // Open the ServiceHost to start listening for messages.
          // The service can now be accessed.
          Console.WriteLine("The service is ready.");
          Console.WriteLine("Press <ENTER> to terminate service.");

          // Close the ServiceHost.
        catch (TimeoutException timeProblem)
        catch (CommunicationException commProblem)

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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