Question

Write a console application that has/does the following

• A method that uses a ref parameter for an integer.

o Change the value of the ref parameter inside the method.

• A method that has optional parameters.

• A method that uses named arguments.

• A Main method that has an integer variable with a value assigned to it.

o Call the method that implements the ref parameter.

o Print the value of the variable both before and after calling the method.

o Call the method that has the optional parameters, both with and without the optional parameter populated in the call.

o Call the named method assigning values to the named arguments.

o In all calls to methods print the arguments before and after the method calls.

Answer 1

using System;

namespace solution // Chane it according to your programm and filename
{
public class Program
{
public static void refmethod(ref int arg) //method with ref parameter
{
arg = arg+10;
}
public static void optionalParamMethod(String fname,String lname="Martin") // method with optional parameter
{
Console.WriteLine("Fullname : " + fname+" "+lname);
}
public static void namedParamMethod(String country,String capital) // method with named parameter
{
Console.WriteLine("Country : "+country+" Capital : "+capital);
  
}
  
public static void Main(string[] args)
{
int a = 5;
  
Console.WriteLine("Value of a before calling the refmethod : "+a);
refmethod(ref a);
Console.WriteLine("Value of a after calling the refmethod : "+a);
Console.WriteLine();
Console.WriteLine();
  
Console.WriteLine("Calling method with optional parameter with the optional argument");
String fname = "Joe";
String lname = "Columbus";
optionalParamMethod(fname,lname);
  
Console.WriteLine("Calling method with optional parameter without the optional argument");
optionalParamMethod(fname);
Console.WriteLine();
Console.WriteLine();
  
Console.WriteLine("Calling method with named parameter argument in same order ");
namedParamMethod(country:"France",capital:"Paris");
  
  
Console.WriteLine("Calling method with named parameter argument in different order ");
namedParamMethod(capital:"Paris",country:"France");

  

}
}
}