Using Parameters

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

namespace CSharpConsole
{
    class Params
    {
        //method with default value to parameterss
        public void AddNums(int x, int y = 50, int z = 25)
        {
            Console.WriteLine(x + y + z);

        }
        //method with both input and output parameterss
        public void Math1(int a, int b, ref int c, ref int d)
        {
            c = a + b;
            d = a * b;
        }
        public void Math2(int a, int b, out int c, out int d)
        {
            c = a + b;
            d = a * b;
        }
        static void Main()
        {
            Params p = new Params();
            // Calling method with default values to parameters
            p.AddNums(100);
            p.AddNums(100, 100);
            p.AddNums(100,z: 100);
            p.AddNums(100, 100, 100);

            // Calling methods with input and output parameters
            int x = 0, y = 0;
            p.Math1(100, 50, ref x, ref y);
            Console.WriteLine(x + "   " + y);

            int m, n;
            p.Math2(200, 25, out m, out n);
            Console.WriteLine(m + "   " + n);
            Console.ReadLine();

        }
    }
}

// Program to print the following pattern
//   *****
//   *****
//   *****
//   *****
//   *****


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

namespace pattern_4
{
    class Program
    {
        static void Main(string[] args)
        {
            int i,j, k;

            for (i = 1; i <= 5; i++)
            {
                for (j = 1; j <= i; j++)
                {
                    Console.Write("");
                }
                for (k = 1; k <= 5; k++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();

            }
            Console.ReadKey();
        }
    }
}
  

// Write a program to print the binary format of a number

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int num;
            Console.Write("Enter a Number : ");
            num = int.Parse(Console.ReadLine());
            int quot;

            string rem = "";

            while (num >= 1)
            {
                quot = num / 2;
                rem += (num % 2).ToString();
                num = quot;
            }

            // Reversing the  value
            string bin = "";
            for (int i = rem.Length - 1; i >= 0; i--)
            {
                bin = bin + rem[i];

            }

            Console.WriteLine("The Binary format for given number is {0}", bin);


            Console.Read();

        }
    }
}

Methods in CSharp

//Using Methods(Example)

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

namespace CSharpConsole
{
    class Method_ex
    {

        //Non value returning method without parameter
        public void Test1()
        {
            int m = 5;
            for (int i = 1; i <= 10; i++)
                Console.WriteLine("{0}*{1}={2}", m, i, m * i);
        }
        // Non value returning method with parameters
        public void Test2(int m, int n)
        {
            for (int i = 1; i <= n; i++)
                Console.WriteLine("{0}*{1}={2}", m, i, m * i);
 
        }
        //value returning method with out parameters
        public string Test3()                  //Static action
        {
            string str = ("Hello Leena");
            str = str.ToUpper();
            return str;
        }
        //value returning method with parameters
        
           
        public string Test4(string str)       
        {                        
            str = str.ToUpper();             //Dynamic Action
            return str;
        }
            
     static void Main(string[] args)
      {
         Method_ex m=new Method_ex();

        //calling non-value returning methods
         m.Test1();
         m.Test2(7,20);
        //Calling value returning methods
         string str=m.Test3();
         Console.WriteLine(str);
         Console.WriteLine(m.Test4("leena"));
         Console.ReadLine();     
         
      }
    }
}

Watched Videos!!!

       Today was a day with practicing some c# programs, some SQL queries and also i saw some videos on C# console application.
      I found one very good link on C# windows programing which is given below
                         Videos of windows programming in C#

Jagged Array

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

namespace jagged_arrray
{
    class Program
    {
        static void Main(string[] args)
        {
             int[][] arr = new int[4][];
            arr[0] = new int[6];
            arr[1] = new int[7]; 
            arr[2] = new int[8];
            arr[3] = new int[4];
            // printing values of jagged array using nested for
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr[i].Length; j++)
                    Console.Write(arr[i][j] + "");
                Console.WriteLine();
            }
            // assigning values of a jagged array using nested for
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr[i].Length; j++)
                    arr[i][j] = j + 1;
            }
            Console.ReadKey();
           

        }
    }
} 

Two Dimentional Array

//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TD_array
{
    class td_array
    {
        static void Main(string[] args)
        {
            int[,] arr=new int[3,5];
            // Can also initialize the values at the time of declaration
            /*int[,] arr = {{11,12,13,14,15},
                         {21,22,23,24,25},
                         {31,32,33,34,35},
                         };*/

            int x = 0;

            //printing values of 2D array using foreach loop
            foreach (int i in arr)
                Console.Write(i + "  ");
            Console.WriteLine("\n");

            //assigning values to 2D array using nested for
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr.GetLength(1); j++)
                {
                    x = x + 5;
                    arr[i, j] = x;
                }

            }
            //printing values of 2D array using nested for loop
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int j = 0; j < arr.GetLength(1); j++)
                    Console.Write(arr[i, j] + "  ");
                Console.WriteLine();
                Console.ReadKey();

            }
        }
    }
}