C#: Check the month, input from the keyboard how many days

//Lets enter the month and year from the keyboard. Check to see that month how many days.
class Program {
        static void Main () {
            int m, y;
            Console.Write ("Enter a month:");
            m = int.Parse (Console.ReadLine ());
            Console.Write ("Enter the year:");
            y = int.Parse (Console.ReadLine ());
            switch (m) {
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                    Console.WriteLine ("{0} No 31 Date", m);
                    break;
                case 4:
                case 6:
                case 9:
                case 11:
                    Console.WriteLine ("30-day months {0}", m);
                    break;
                case 2:
                    if ((y% 4 == 0 && y% 100! = 0) | | (y% 400 == 0))
                        Console.WriteLine ("{0} No 29 Date", m);
                    else
                        Console.WriteLine ("{0} No 28 Date", m);
                    break;
            }
            Console.ReadLine ();
        }
    }

C#: Write a program to print to the screen the numbers from 1 to 6 (basic)

//Requirements: Write a program to print to the screen the numbers from 1 to 6 as follows:

1                                                

12                                              

123                                            

1234                                          

12345                                        

123456

//Code:
class Program{
        static void Main()
        {
            for (int i = 1; i < 7; i++) {
                for (int j = 1; j <= i; j++)
                    Console.Write(j);
                    Console.WriteLine();
            }
            Console.ReadLine();

        }
}

C#: Permutation two integer numbers

//Example: Write a program with type Console Application, enter two numbers a and b. Take two of these permutations. For example: a = 5, b = 7 => a = 7, b = 5.
namespace Example_Permutation{
    class Program{
        static void Main (){
            int a, b, temp;
            Console.Write ("Enter A:");
            a = int.Parse (Console.ReadLine ());
            Console.Write ("Enter B:");
            b = int.Parse (Console.ReadLine ());
            / / Use intermediate variable temp to store the swap value of a, b
            temp = a;
            a = b;
            b = temp;
            Console.WriteLine ("The value of a = {0}, b = {1}", a, b);
            Console.ReadLine ();
        }
    }
}

C#: Calculate the total of 3 digits from the 3-digit integer n (input from the keyboard).

//Example: Write a program with type Console Application, enter the 3-digit integer n. Please calculate the total 3 digits.
namespace BaiThucHanh1
{
    class Program
    {
        static void Main (){
            int n;
            Console.Write ("Enter n:");
            n = int.Parse (Console.ReadLine ());
            int s = 0;
            int balance;
            while (n! = 0) {
                balance = n % 10;
                s+=balance;
                n = n / 10;
            }
            Console.WriteLine ("The total of 3 digits is: {0}", s.ToString ());
            Console.ReadLine ();
        }
    }
}

C#: Enter two variables a, b (integer). Calculate the total and the results on the screen.

//Example: Write a program with type Console Application, enter two integers a, b. Please calculate the total and the results on the screen.
using System;
namespace Total{
    class Program{
        static void Main (){
            int a, b;
            Console.Write ("Enter first integer:");
            a = int.Parse (Console.ReadLine ());
            Console.Write ("Enter second integer:");
            b = int.Parse (Console.ReadLine ());
            Console.WriteLine (a + b);
            Console.ReadLine ();
        }
    }
}

Access: CREATE TABLE Statement

'Example: Creates a new table called ThisTable with two text fields.

Sub CreateTable1()

    Dim dbs As Database

    ' Modify this line to include the path to Northwind
    ' on your computer.
    Set dbs = OpenDatabase("Northwind.mdb")

    ' Create a table with two text fields.
    dbs.Execute "CREATE TABLE ThisTable(FirstName CHAR, LastName CHAR);"

    dbs.Close

End Sub

C#: Calculate the factorial of n

//Example 3. Write a program with a Console Application, the factorial of n raw keyboard input.
class Program
    {
        static void Main ()
        {
            int n;
            int GT = 1;
Console.Write ("Enter the number of n identity factorial:");
            n = int.Parse (Console.ReadLine ());
            for (int i = 2; i <= n; i + +)
                GT * = i;
            Console.WriteLine ("The factorial of {0} is: {1}", n, GT);
            Console.ReadLine ();
        }
    }

C#: An example about FOR loop

/ / Example 1: Write a C # program using FOR in structure to the screen the results are as follows:
*******
******
*****
****
***
**
*
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace FOR_1 {
class Program {
static void Main (string [] args) {
     int i, j;
     for (i = 0; i <= 6; i + +) {
           for (j = 1; j <= 7-i; j + +) Console.Write ("*");
           Console.Write ("\ n");
     }
Console.ReadLine ();
   }
 }
}

C#: Date Time Client - Socket Programming

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;

namespace Client{
    class DateTimeClient {
        static void Main(string[] args) {
            IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"),2009);
            Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            client.Connect(iep);
            NetworkStream ns = new NetworkStream(client);
            StreamReader sr = new StreamReader(ns);
            StreamWriter sw = new StreamWriter(ns);
            while (true) {
                string input = Console.ReadLine();
                sw.WriteLine(input);
                sw.Flush();
                if (input.ToUpper().Equals("QUIT")) break;
                string kq = sr.ReadLine();
                Console.WriteLine(kq);
            }
            sr.Close();
            sw.Close();
            ns.Close();
        }
    }
}

C#: Start Process Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
namespace Demo_Thread{
    public class StartProcessExample{
        static void Main(string[] args){
            ProcessStartInfo startInfo = new ProcessStartInfo();
            startInfo.FileName = "notepad++.exe"; startInfo.Arguments = "noominhee.txt"; startInfo.WorkingDirectory = @"G:\LTW3\2";
            startInfo.WindowStyle = ProcessWindowStyle.Maximized;
            startInfo.ErrorDialog = true;
            using (Process process = new Process()) {
                process.StartInfo = startInfo;
                try{
                    process.Start();
                    Console.WriteLine("Waiting 30 seconds for process to" + " finish.");
                    process.WaitForExit(30000);
                }
                catch (Exception ex) {
                    Console.WriteLine("Could not start process.");
                    Console.WriteLine(ex);
                }
            }
            Console.WriteLine("Main method commplete. Press Enter.");
            Console.ReadLine();
            }        
        }
    }