 up vote 0 down vote You must inquire an issue to youself: why I would like x to generally be static? Should you make x static it implies that x is a component of all objects of course A, but when x just isn't static this means, than x is part only of 1 object.
A static variable exists to some operate, or course, in lieu of an occasion or object. It could possibly get an Preliminary benefit just one time. Therefore When you've got code such as "static int a=0" in a very sample perform, which code is executed in a primary phone of the purpose, although not executed in a subsequent get in touch with with the operate; variable (a) will continue to have its existing value (for example, a current price of five), since the static variable will get an Preliminary worth only one time.
Const variables undoubtedly are a promise that you are not going to change its value any where in This system. If you are doing it, it is going to complain.
With readonly you're telling the clr that the worth won't ever modify in the lifetime in the instance or perhaps the AppDomain in the situation of a static field and so it can be lazy and utilised cached values safely.
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To entry this variable, i really need to reference y. If x was static however, i can access this variable with no references to y. That is The easiest method to go, in the condition whereby several methods within the class y will be referencing this value ?
Does the readonly flag imply that the value is usually readily available due to finding initialized with the static constructor of the website class, indicating that the worth will almost always be accessible?
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Having said that, even though they retain their values for The entire life time of the program They're inaccessible outside the code block they are in
Very first, a const variable just isn't a reference to something; it is literal benefit "burned" into the code (employing a constant may be the true definition of really hard coding a price).
Please go in the summary of dissimilarities in between const and readonly then I'll try out to elucidate Each and every point after that.
Now we get back again for the query Roger originally asked: what is the difference between a variable declared as const and the exact same variable declared as static readonly?
Points out defense of item states by encapsulation, or perhaps the bundling of an object's info and performance.