using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        try

        {

            throw ExceptionHelper.CreateTechnicalException(1001);

        }

        catch (TechnicalException ex)when (ex.ErrorSeverity > Severity.Warning)

        {

            Console.WriteLine($"{ex.ErrorCode} {ex.Message}");

        }

​

        try

        {

            throw ExceptionHelper.CreateTechnicalException(2002);

        }

        catch (TechnicalException ex)when (ex.ErrorSeverity > Severity.Warning)

        {

            Console.WriteLine($"{ex.ErrorCode} {ex.Message.Replace("$id$", "1").Replace("$type$", "myType")}");

        }

    }

}

​

public static class ExceptionHelper

{

    private static Dictionary<int, string> TechnicalErrorDictionary = new Dictionary<int, string>{{1001, "User with id $id$ does not exist"}, {1002, "Created user with id $id$"}, {2002, "User with id $id$ with type $type$ is invalid"}, {3003, "Unexpected server error"}, {4001, "Some text with $param1$ and another $param2$ included on $param3$"}};

    /// <exception cref = "KeyNotFoundException">the errorCode did not exist in dictionary</exception>

    public static TechnicalException CreateTechnicalException(int errorCode)

    {

        return new TechnicalException(errorCode, TechnicalErrorDictionary[errorCode]);

    }

}

​

public class TechnicalException : Exception

{

    public int ErrorCode

    {

        get;

    }

​

    public Severity ErrorSeverity

    {

        get;

    }

​

    public TechnicalException(int errorCode, string errorDescription): base (errorDescription)

    {

        ErrorCode = errorCode;

        ErrorSeverity = Severity.Error;

    }

}

​

public enum Severity

{

    Warning,

    Error

}