namespace TheCyclopsContracts.Exceptions; public class ElementExistsException : Exception { public string ParamName { get; private set; } public string ParamValue { get; private set; } public ElementExistsException(string paramName, string paramValue) : base($"There is already an element with value {paramValue} of parameter {paramName}") { ParamName = paramName; ParamValue = paramValue; } }