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    <blockquote> <p>1) why we give reference to the other project? cant we just use inheritance?</p> </blockquote> <p>This question makes no sense. What does inheritance have to do with project references. Can you elaborate?</p> <blockquote> <p>2) after we give the reference by using the visual studio IDE why we have to add the project to the namespace system?</p> </blockquote> <p>Because there's an inherent difference between an assembly referencing another assembly (which is what happens when you add a reference to the project) and the <em>language</em> knowing where to find a <em>class</em> which is what happens when you use the <code>using</code> directive in a file.</p> <p>For example, suppose you create a class in your project called <code>TextBox</code>. Then in another file you want to use that class. How would the language know whether you are referring to your custom <code>TextBox</code> class or another one in a referenced assembly? The answer to that question is <em>namespaces</em>. By fully-qualifying the class name with its namespaces, you tell the compiler which class you're using.</p> <p>The <code>using</code> directive is a way to specifying the namespace once per file instead of every time you use the class (or other classes in that namespace). So if you need to reference your <code>TextBox</code> class multiple times within a single file, you wouldn't want to have to write this <em>every</em> time:</p> <pre><code>MyCodebase.MyAssembly.MyNamespace.MyOtherNamespace.SomethingElse.TextBox </code></pre> <p>Instead, you include a <code>using</code> directive of the entire namespace, so you only have to write this:</p> <pre><code>TextBox </code></pre>
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    1. POwhy we give reference to the other projects?
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    1. USDavid
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    1. COthank you all. i learn a lot from all of your writings. for the 1st question to explain more. lets say we have a solution which uses more then one projects and i give reference to an another project so that i can refer to the project that the reference has been given. so that i can reach to the other project also. but why this way but not by inheriting or by making a library of the class that im imheriting and using the dll in the other project. since im new i may miss the concepts but i asked my question according to the shallow knowledge that i have had.
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      1. USmodest and cute girl
    2. CO@modestandcutegirl: I still get the feeling that you're not understanding the term "inheritance" in this case. In your project you would make reference to another assembly in order to use the code in that assembly. This reference can be a reference to a project in the current solution. It could also be a reference to a DLL file. I generally prefer the former because it makes better use of the IDE's functionality. But this may not be what you're asking. Can you give a more complete example in the question about how you're referencing code and maybe give an example of your proposed alternative?
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      1. USDavid
 

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