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If you have a windows service and a windows forms application that uses the same static object, is it the same object in both applications? In other words if I update the object in the service will it also be updated in the forms application as well if both are running at the same time?
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Static variables are, essentially, global variables. All instances of the class share the same static variable.
A "static" object is unique; it belongs to the class rather than the instance of the class. In other words, a static variable is only allocated to the memory once: when the class loads.
Static objects are declared with the keyword static. They are initialized only once and stored in the static storage area. The static objects are only destroyed when the program terminates i.e. they live until program termination. A program that demonstrates static objects in C++ is given as follows.
Only one copy of a static member exists, regardless of how many instances of the class are created.
Class is known as the class level object and static variables are called class variable because static variables lie as the state of the class level object.
The static variable can be used to refer to the common property of all objects (which is not unique for each object), for example, the company name of employees, college name of students, etc. The static variable gets memory only once in the class area at the time of class loading.
They run on different processes so they don't share the static object.
Not exaclty related with your question but threads created on the same application is a different story. They will share the static variable unless is marked with ThreadStatic attribute
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No. Unless you do something specific to achieve this objects are not shared between different processes.
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