title: creating a object from string with unknown number of parameters in c#
body: <p>I am trying to create a class that gets from the user a name of a class and unknown number of parameters, and creates a suitable object.
  when i run my code, i get a MissingMethod Exception.</p>
  
  <p>this is my code:</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  
  namespace Project2
  {
      class Class1
      {
          public static void Main()
          {
              Console.WriteLine("enter a class name");
              string className = Console.ReadLine();
              Console.WriteLine("enter parameters seperate with a space");
              string parametersLine = Console.ReadLine();
              string []parameters = parametersLine.Split(' ');
              //Console.WriteLine(parameters.Length);
              CreateObject createObject = new CreateObject(className, parameters);
              Console.ReadKey();
          }
      }
  
      class CreateObject
      {
      private readonly string className;
          public CreateObject(string className, string[] parameters)
          {
              this.className = className;
              try
              {
                  if (parameters.Length == 1 &amp;&amp; parameters[0] == "") // no parameters
                  {
                      Activator.CreateInstance(className.GetType());
                  }
  
                  else {
                      Activator.CreateInstance(className.GetType(), parameters); 
                  }
              }
              catch (Exception e)
              {
                  Console.WriteLine(e.GetType());
              }
          }
      }
  
      class Person
      {
          public int id{ get; set; }
          public string name{ get; set; }
          public Person()
          {
              Console.WriteLine("Created empety Person object");
          }
          public Person(int id, string name)
          {
              this.id = id;
              this.name = name;
              Console.WriteLine("Created Person object. " +"id:" + id + "   name:" + name);
          }
      }
  
      class Point
      {
          public int x { get; set; }
          public int y { get; set; }
          public int z { get; set; }
  
          public Point()
          {
              Console.WriteLine("Created empety Point object");
          }
          public Point(int x, int y, int z)
          {
              this.x = x;
              this.y = y;
              this.z = z;
              Console.WriteLine("Created Point object. " + "x:" + x + "   y:" + y + "   z:" + z);
          }
      }
  }
  </code></pre>