Return to Answer

The struct should probably also implement IEquatable and IComparable (+their generic counterparts, for string and NonEmptyString both), and IEnumerable+IEnumerable<char> too, for almost-complete parity with a string.

The try/catch is superfluous, a guard clause should be throwing before the constructor is even invoked IMO; the exception could be an ArgumentNullException, but that would be confusing if value was actually string.Empty. Or even derive a custom exception from ArgumentException:

The try/catch is superfluous, a guard clause should be throwing before the constructor is even invoked IMO; the exception could be an ArgumentNullException, but that would be confusing if value was actually string.Empty. Perhaps derive a custom exception from ArgumentException:

Could be just me, but depending on context I think I might prefer an extension method on string, over an implicit (or explicit) cast operator:

var foo = "hi".AsNonEmptyString();