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lang-cs
int startandint count. Your examples wont work right the way they were written. You write it as if the second argument isint end. For example -Enumerable.Range(11,20)would result in 20 numbers starting with 11, and not numbers from 11 to 20.Enumerable.Range(11,20).Contains(c)is equivalent tofor(int i = 11; i < 21; ++i){ if (i == c) return true; } return false;If you had a large range it would take a long time, while just using>and<would be quick and constant-time.MySwitchWithEnumerablereturnvoidis weak design for this situation. REASON: You've converted anif-elseto a series of independent statements - that hides the intent, which is that they are mutually-exclusive - only oneactionis executed. Instead returnbool, with bodyif (..) { action(); return true; } else return false;The calling site then shows the intention:if (MySwitchWithEnumerable(..)) else (MySwitchWithEnumerable(..));. This is preferable. However, it is also no longer a significant improvement over your original version, for this simple case.