using System;

/*
  <Tips>
    <Tip>
      Parameter with "out" modifier cannot be read.
    </Tip>
    <Tip>
      Parameter with "out" modifier should be assigned value before
      leaving the function.
    </Tip>
    <Tip>
      Parameter with "ref" modifier should be assigned value
      before the function call.
    </Tip>
    <Tip>
      Numeric/String Literals are not passed to the function
      with "ref" modifier.
    </Tip>
    <Tip>
      To Pass Variable No.of arguments to a function use
      "params"modifier.
    </Tip>
  </Tips>
*/

class ParamDemo
{
  public static void Main()
  {
    int TestValue=100;
    ParamDemo obj=new ParamDemo();
    obj.ParamIn(TestValue);
    Console.WriteLine("Default Mechanism: {0}",TestValue);
    obj.ParamRef(ref TestValue);
    Console.WriteLine("ref Argument: {0}",TestValue);
    TestValue=100;
    obj.ParamOut(out TestValue);
    Console.WriteLine("out Argument: {0}",TestValue);
    obj.ParamParams(1,2,3,4,5);
  }

  public void ParamIn(int Value)
  {
    Value=200;
  }

  public void ParamRef(ref int Value)
  {
    Value=200;
  }

  public void ParamOut(out int Value)
  {
    //Console.WriteLine(Value); //This Causes Error only Writing is Permitted
    Value=200; // This Should not be omitted.Function should Assign Out Param
  }

  public void ParamParams(params int[] Values)
  {
    foreach(int val in Values)
    {
      Console.WriteLine(val);
    }
  }
}