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copied!<p>I don't have the time to write up a detailed description of the <em>differences</em> between C++, C, C# and Java. I will merely say that the C# behaviour of the pre and post increment operators is <strong>fully specified</strong> (in single-threaded scenarios; if you want to know about its atomicity, guarantees about observations of read and write orders in multi-processor weak memory models and so on, you're on your own to do that research.) It is not fully specified in C and C++; a compiler has broad lattitude to do whatever it pleases with re-ordering side effects. I have never used Java so I'm not going to hazard a guess as to what Java does.</p> <p>For more information on what C# does you should read the C# specification. For a short take on it, read my answer to this question:</p> <p><a href="https://stackoverflow.com/questions/3346450/c-what-is-the-difference-between-i-and-i/3346729#3346729">What is the difference between i++ and ++i?</a></p> <p>For an even shorter take:</p> <p>Subexpressions in a C# expression are logically grouped by precedence and associativity, and then evaluated from <strong>left to right</strong> regardless. (So for example, A() + B() * C() evaluates A(), then B(), then C(). The fact that the multiplication "comes before" the addition is irrelevant; the subexpressions are always evaluated left to right.) </p> <p>If the evaluation of a subexpression causes a side effect because of a pre or post increment subexpression then the side effect happens <em>immediately before</em> the result is produced.</p>

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