ServiceHost Constructor (Object, Uri[])
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ServiceHost Constructor (Object, Uri[])

Initializes a new instance of the ServiceHost class with the instance of the service and its base addresses specified.

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

public ServiceHost(
	Object singletonInstance,
	params Uri[] baseAddresses


Type: System.Object

The instance of the hosted service.

Type: System.Uri[]

An Array of type Uri that contains the base addresses for the hosted service.


singletonInstance is null.

Use this constructor as an alternative to implementing a custom System.ServiceModel.Dispatcher.IInstanceContextInitializer when you want to provide a specific object instance for use by a singleton service. You may want to use this overload when your service implementation type is difficult to construct (for example, if it does not implement a default public constructor that has no parameters).

Note that when an object is provided to this overload, some features related to the Windows Communication Foundation (WCF) instancing behavior work differently. For example, calling InstanceContext.ReleaseServiceInstance have no effect when a well-known object instance is provided using this constructor overload. Similarly, any other instance release mechanism is ignored. The ServiceHost always behaves as if the OperationBehaviorAttribute.ReleaseInstanceMode property is set to ReleaseInstanceMode.None for all operations.

CalculatorService service = new CalculatorService();
ServiceHost serviceHost = new ServiceHost(service, baseAddress);

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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