Reflection constructors, C#

Reflection constructors

//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Reflection;

namespace Rextester
{

class MyClass
{

int x;

int y;
    
    int z;

public MyClass(int i)
	{

Console.WriteLine("Constructing MyClass(int, int). ");

x = y = i;

}

public MyClass(int i, int j) 
	{

Console.WriteLine("Constructing MyClass(int, int). ");

x = i;

y = j;

Show();

}
    public MyClass(int i, int j,int k) 
	{

Console.WriteLine("Constructing MyClass(int, int,int). ");

x = i;

y = j;
        z=k;

Show();

}

public int Sum() 
	{

return x+y+z;

}

public bool IsBetween(int i)
	{

if((x < i) && (i < y)) return true;

else return false;

}

public void Set(int a, int b) 
	{

Console.Write("Inside Set(int, int). ");
		x = a;

y = b;

Show();

}

// Overload Set.

public void Set(double a, double b) 
	{

Console.Write("Inside Set(double, double). ");

x = (int) a;

y = (int) b;

Show();

}

public void Show() 
	{

Console.WriteLine("Values are x: {0}, y: {1}, z:{2}", x, y, z);

}
}
	public class Program
	{
		public static void Main(string[] arg)
		{
            object reflectOb=null; ;
			Type t = typeof(MyClass);

int val;

// Get constructor info.

ConstructorInfo[] ci = t.GetConstructors();

Console.WriteLine("Available constructors: ");

foreach(ConstructorInfo c in ci)
			{

// Display return type and name.

Console.Write(" " + t.Name + "(");

// Display parameters.

ParameterInfo[] pi = c.GetParameters();

for(int i=0; i < pi.Length; i++) 
				{

Console.Write(pi[i].ParameterType.Name +

" " + pi[i].Name);

if(i+1 < pi.Length) Console.Write(", ");

}

Console.WriteLine(")");

}

Console.WriteLine();

// Find matching constructor.

int x;
            int ch=0;
            do
            {
                Console.WriteLine("Enter number of pareameters:\n");
                ch=Convert.ToInt32(Console.ReadLine());
                for(x=0; x < ci.Length; x++) 
                {
                     ParameterInfo[] pi = ci[x].GetParameters();
                     if(pi.Length==ch)
                     {
                         break;
                     }
                    
                }
                if(ch==3)
                {
                    Console.WriteLine("Two-parameter constructor found.\n"); 
                    object[] consargs = new object[3];

consargs[0] = 10;

consargs[1] = 20;
                    consargs[2] = 30;

reflectOb = ci[x].Invoke(consargs);
                    break;
                }
                
                if(ch== 2)
                {
                    Console.WriteLine("Two-parameter constructor found.\n"); 
                    object[] consargs = new object[2];

consargs[0] = 10;

consargs[1] = 20;
                   // consargs[2] = 30;

reflectOb = ci[x].Invoke(consargs);
                    break;
                }
                
                /*if(x == ci.Length) 
                {
                    Console.WriteLine("No matching constructor found.");

return;

}*/

//}
            }while(ch!=0);
            Console.WriteLine("x=:"+x);

// Construct the object.

/*object[] consargs = new object[3];

consargs[0] = 10;

consargs[1] = 20;
            consargs[2] = 30;

object reflectOb = ci[x].Invoke(consargs);*/

Console.WriteLine("\nInvoking methods on reflectOb.");

Console.WriteLine();

MethodInfo[] mi = t.GetMethods();

// Invoke each method.

foreach(MethodInfo m in mi) 
			{

// Get the parameters.

ParameterInfo[] pi = m.GetParameters();

if(m.Name.Equals("Set", StringComparison.Ordinal) &&

pi[0].ParameterType == typeof(int)) 
				{

// This is Set(int, int).

object[] args = new object[2];

args[0] = 9;

args[1] = 18;

m.Invoke(reflectOb, args);

}

else if(m.Name.Equals("Set", StringComparison.Ordinal) &&

pi[0].ParameterType == typeof(double)) 
				{

// This is Set(double, double).

object[] args = new object[2];

args[0] = 1.12;

args[1] = 23.4;

m.Invoke(reflectOb, args);

}

else if(m.Name.Equals("Sum", StringComparison.Ordinal)) 
				{

val = (int) m.Invoke(reflectOb, null);

Console.WriteLine("sum is " + val);

}

else if(m.Name.Equals("IsBetween", StringComparison.Ordinal))
				{
					
					object[] args = new object[1];

args[0] = 14;

if((bool) m.Invoke(reflectOb, args))

Console.WriteLine("14 is between x and y");

}

else if(m.Name.Equals("Show")) 
				{

m.Invoke(reflectOb, null);

}

}
}


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