Unlike C++, in C# you can’t force execution of a switch statement to “fall through” from one case clause to another by leaving out the break statement. Each case clause must end with a break, goto, throw or return statement.
The following code results in a compile-time error.
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| switch (carType) // carType is a string{ case "Saturn": Console.WriteLine("Domestic car"); case "Yugo": Console.WriteLine("Inexpensive car"); break;} |
Technically, the requirement is that the end of the statement block in a case clause must not be reachable–implying that you must transfer control out of the block, typically with a break statement. This requirement means that it wouldbe valid syntax to include an infinite loop in a case clause, without a break statement.