public static string AddSuggestedFixInfoToMessage <TSource, TDestination>( MapTester <TSource, TDestination> mapTester, Exception ex) { string message = ex.Message; try { string mapTesterString = mapTester.ToString(); if (mapTesterString.Contains("MapTester.ForMap")) { string suggestedCode = mapTesterString .Replace("MapTester.ForMap", "cfg.CreateMap") .Replace(".WhereMember(", ".ForMember(") .Replace(".ShouldEqualValue(", ".UseValue(") .Replace(".ShouldEqual(", ".MapFrom(") .Replace(".IsTestedBy((src, dest) => { /* custom test */ })", ".UseValue(() => ???)") .Replace(".IgnoringMember", ".IgnoreMember"); message = $"{message}\n{new string('_', Console.BufferWidth)}" + $"\nThe following code snippet might be useful for making your map match the test:\n" + suggestedCode; } } catch { } return(message); }