Unit test like this will fail if more than 10 methods create NotImplementedException. On failing it will report all methods that create this exception.
var throwingMethods = codebase.Methods .Where(m => m .GetInstructions() .Exists(i => i.Creates<NotImplementedException>())) .ToArray(); if (throwingMethods.Length > 10) CollectionAssert.IsEmpty(throwingMethods);
Where codebase is created like this:
var codebase = new Codebase("Assembly1.dll","Assembly2.dll");
Snippet uses Lokad.Quality.dll from the Lokad Shared Libraries.