Edit: this all changes in C# 5, with a change to where the variable is defined (in the eyes of the compiler). From C# 5 onwards, they are the same. Before C#5 The second is safe; the first isn’t. With foreach, the variable is declared outside the loop – i.e. Foo f; while(iterator.MoveNext()) { f … Read more
Depending upon use case, I would normally use something simple like the following: abstract class DaysOfWeek { const Sunday = 0; const Monday = 1; // etc. } $today = DaysOfWeek::Sunday; However, other use cases may require more validation of constants and values. Based on the comments below about reflection, and a few other notes, … Read more
The collection used in foreach is immutable. This is very much by design. As it says on MSDN: The foreach statement is used to iterate through the collection to get the information that you want, but can not be used to add or remove items from the source collection to avoid unpredictable side effects. If … Read more
How to enumerate an enum