using System;

public class Program

{

    public static void Main()

    {

        try

        {

            new Temp().ConditionalThrow(t => true, typeof(MyException), "Alberto", "25");

        }

        catch (MyException ex)

        {

            Console.WriteLine(ex.Message);

        }

        try

        {

            new Temp().ConditionalThrow(t => true, typeof(MyException));

        }

        catch (MyException ex)

        {

            Console.WriteLine(ex.Message);

        }

        try

        {

            new Temp().ConditionalThrow(t => true, typeof(string));

        }

        catch (ArgumentException ex)

        {

            Console.WriteLine(ex.Message);

        }

    }

}

​

public static class Ext

{

    internal static TSource ConditionalThrow<TSource>(this TSource source, Func<TSource, bool> throwCondition, Type exceptionType, params object[] arguments)

    {

        if (!typeof(Exception).IsAssignableFrom(exceptionType))

            throw new ArgumentException("exceptionType is not an Exception");

        if (throwCondition(source))

            throw Activator.CreateInstance(exceptionType, arguments) as Exception;

        return source;

    }

}

​

public class Temp

{

    public string Name { get; set; }

}

​

public class MyException : Exception

{

    public MyException(string name, string age)

        : base($"Name: {name} and Age: {age}")

    { }

    public MyException()

        : base("No parameter")

    { }

}