What is marshallrefobject in remoting

Hi Gaurav,

An application domain is a partition in an operating system process where one or more applications reside. Objects in the same application domain communicate directly. Objects in different application domains communicate either by transporting copies of objects across application domain boundaries, or by using a proxy to exchange messages.

MarshalByRefObject is the base class for objects that communicate across application domain boundaries by exchanging messages using a proxy. Objects that do not inherit from MarshalByRefObject are implicitly marshal by value. When a remote application references a marshal by value object, a copy of the object is passed across application domain boundaries.

MarshalByRefObject objects are accessed directly within the boundaries of the local application domain. The first time an application in a remote application domain accesses a MarshalByRefObject, a proxy is passed to the remote application. Subsequent calls on the proxy are marshaled back to the object residing in the local application domain.

Types must inherit from MarshalByRefObject when the type is used across application domain boundaries, and the state of the object must not be copied because the members of the object are not usable outside the application domain where they were created.

For more Info:
http://msdn.microsoft.com/en-us/library/system.marshalbyrefobject(v=vs.71).aspx
http://reflector.webtropy.com/default.aspx/4@0/4@0/untmp/DEVDIV_TFS/Dev10/Releases/RTMRel/ndp/clr/src/BCL/System/MarshalByRefObject@cs/1305376/MarshalByRefObject@cs
http://www.codeproject.com/Articles/8771/Simple-but-potentially-useful-example-of-NET-Remot

3 Replies

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Munesh Sharma10y ago
Remoting; it means that between AppDomains or machines, rather than serialize and transfer theobject, the object stays at one end and a proxy is created at the other. All method calls to the proxy are intercepted and the call is transmitted as RPC ^{wiki, msdn}, causing the method to execute on the other machine (typically serialising the arguments and return value).
Note: this can lead to unexpectedly "chatty" interfaces. The object/proxy/RPC approach is now less preferable to approaches with an explicit service boundary; Microsoft now recommends WCF ^wiki,msdn instead of remoting.
Senthilkumar14y ago
Hi Gaurav,

An application domain is a partition in an operating system process where one or more applications reside. Objects in the same application domain communicate directly. Objects in different application domains communicate either by transporting copies of objects across application domain boundaries, or by using a proxy to exchange messages.

MarshalByRefObject is the base class for objects that communicate across application domain boundaries by exchanging messages using a proxy. Objects that do not inherit from MarshalByRefObject are implicitly marshal by value. When a remote application references a marshal by value object, a copy of the object is passed across application domain boundaries.

MarshalByRefObject objects are accessed directly within the boundaries of the local application domain. The first time an application in a remote application domain accesses a MarshalByRefObject, a proxy is passed to the remote application. Subsequent calls on the proxy are marshaled back to the object residing in the local application domain.

Types must inherit from MarshalByRefObject when the type is used across application domain boundaries, and the state of the object must not be copied because the members of the object are not usable outside the application domain where they were created.

For more Info:
http://msdn.microsoft.com/en-us/library/system.marshalbyrefobject(v=vs.71).aspx
http://reflector.webtropy.com/default.aspx/4@0/4@0/untmp/DEVDIV_TFS/Dev10/Releases/RTMRel/ndp/clr/src/BCL/System/MarshalByRefObject@cs/1305376/MarshalByRefObject@cs
http://www.codeproject.com/Articles/8771/Simple-but-potentially-useful-example-of-NET-Remot
Vulpes14y ago
Please check my answer in this previous thread:

http://www.c-sharpcorner.com/Forums/Thread/142764/net-remoting-i-have-to-use-marshal-by-reference-in-thi.aspx