WMI is a set of extensions to the windows drives model that provides an opertaing system interface through which instrumental components provide information and notification.Microsoft also provides a command line interface to WMI called Windows Management Instrumentation Command Line(WMIC)
Win32-Operating System
            CSName,Caption,Windows directory,serialno,registered user,no of processes
Win32-Bios
Version,name,manufacturer,serialnumber,release date,current language,primary bios,status
            Win32-ComputerSystem
                        Manufacturer,username,totalphysicalmemory,system type,model
            Win32-Processor
                        Caption,Current Clock Speed
            Win32-TimeZone
                        Caption
            Win32-CDROMDrive
                        Caption,mediatype,drive,manufacturer,description
            Win32-Account
                        Name,description,domain,sid
            Win32-DiskDrive
                        Caption,deviceid,index,partitions


            using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Management;

namespace WindowsFormsApplication1
{
    public partial class WMI : Form
    {
        public WMI()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            SelectQuery query = new SelectQuery("Win32OperatingSystem");
            ManagementObjectSearcher search = new ManagementObjectSearcher(query);
            foreach (ManagementObject mobj in search.Get())
            {
                MessageBox.Show(mobj["CSname"].ToString());
            }

        }

        private void WMI_Load(object sender, EventArgs e)
        {

        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace WindowsFormsApplication1
{
    public partial class graphics : Form
    {
        public graphics()
        {
            InitializeComponent();
        }

        private void graphics_Load(object sender, EventArgs e)
        {

        }

        private void graphics_Paint(object sender, PaintEventArgs e)
        {
            Graphics g;
            g = this.CreateGraphics();
            Pen p = new Pen(Brushes.Purple, 3);
            g.DrawEllipse(p, 100, 100, 100, 100);
            g.FillEllipse(Brushes.Plum, 200, 100, 100, 200);
            g.DrawLine(p, new Point(100, 200), new Point(200, 100));
            Point[] p1 = new Point[5];
            p1[0] = new Point(100, 50);
            p1[1] = new Point(200, 100);
            p1[2] = new Point(250, 100);
            p1[3] = new Point(200, 50);
            p1[4] = new Point(100, 250);
            g.DrawPolygon(p, p1);
            System.Drawing.Font f = new Font("Times New Roman", 15, FontStyle.Bold);
            StringFormat f1 = new StringFormat(StringFormatFlags.NoClip);
            StringFormat f2 = new StringFormat(f1);
            f1.LineAlignment = StringAlignment.Center;
            f2.FormatFlags = StringFormatFlags.DirectionVertical;
            f2.Alignment = StringAlignment.Far;
            Rectangle r=new Rectangle(100,100,100,100);
            g.DrawRectangle(Pens.Brown, r);
            g.DrawString("Hello world", f, Brushes.Red, r.X, r.Y, f1);
            g.DrawString("Hai", f, Brushes.SlateBlue, r.Left, r.Top, f2);




        }
    }}



Private Sub dgvSubscriptions_RowPostPaint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewRowPostPaintEventArgs) Handles dgvSubscriptions.RowPostPaint
        Try
            ' Dim b As SolidBrush = New SolidBrush(dgvSubscriptions.RowHeadersDefaultCellStyle.ForeColor)

            'e.Graphics.DrawString((e.RowIndex + 1).ToString(), e.InheritedRowStyle.Font, b, e.RowBounds.Location.X + 10, e.RowBounds.Location.Y + 4)
            Dim dg As DataGridView = DirectCast(sender, DataGridView)
            ' Current row record

            Dim rowNumber As String = String.Empty
            rowNumber = (e.RowIndex + 1).ToString()



            ' Format row based on number of records displayed by using leading zeros
            While rowNumber.Length < dg.RowCount.ToString().Length
                rowNumber = "0" & rowNumber
            End While

            ' Position text
            Dim size As SizeF = e.Graphics.MeasureString(rowNumber, Me.Font)
            If dg.RowHeadersWidth < CInt(size.Width + 20) Then
                dg.RowHeadersWidth = CInt(size.Width + 20)
            End If

            ' Use default system text brush
            Dim b As Brush = SystemBrushes.ControlText


            ' Draw row number
            e.Graphics.DrawString(rowNumber, dg.Font, b, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + ((e.RowBounds.Height - size.Height) / 2))
        Catch ex As Exception
            Utils.LogHandler.HandleError(ex)
        End Try
    End Sub





Form2 Form2 = new Form2();


Form2.StartPosition = FormStartPosition.CenterParent;

this.Hide();

Form2.ShowDialog();

this.Close();
using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;
using System.Xml;using System.Text;

using System.Security.Cryptography;

using System.IO;using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

string str= Encrypt("Silpa");

SqlConnection con = new SqlConnection("Data Source=INFO-9;Initial Catalog=test;Integrated Security=True");

SqlCommand cmd=new SqlCommand("insert into pwdd values('"+str+"')",con);

con.Open();

cmd.ExecuteNonQuery();

con.Close();

string str1 = Decrypt("88tlfz/eGbtHNKDnXU6gQw==");

}
public static string Decrypt(string TextToBeDecrypted)

{

RijndaelManaged RijndaelCipher = new RijndaelManaged();
string Password = "CSC";

string DecryptedData;
try {

byte[] EncryptedData = Convert.FromBase64String(TextToBeDecrypted);
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());

//Making of the key for decryption

PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);

//Creates a symmetric Rijndael decryptor object.

ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream(EncryptedData);

//Defines the cryptographics stream for decryption.THe stream contains decrpted data

CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read);
byte[] PlainText = new byte[EncryptedData.Length];

int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length); memoryStream.Close();

cryptoStream.Close();
//Converting to string

DecryptedData = Encoding.Unicode.GetString(PlainText, 0, DecryptedCount);

}

catch

{

DecryptedData = TextToBeDecrypted;

}

return DecryptedData;

}
public static string Encrypt(string TextToBeEncrypted)

{

RijndaelManaged RijndaelCipher = new RijndaelManaged();

string Password = "CSC";

byte[] PlainText = System.Text.Encoding.Unicode.GetBytes(TextToBeEncrypted);

byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString()); PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);

//Creates a symmetric encryptor object.

ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));

MemoryStream memoryStream = new MemoryStream();

//Defines a stream that links data streams to cryptographic transformations CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor, CryptoStreamMode.Write);

cryptoStream.Write(PlainText, 0, PlainText.Length);

//Writes the final state and clears the buffer

cryptoStream.FlushFinalBlock();

byte[] CipherBytes = memoryStream.ToArray();

memoryStream.Close();

cryptoStream.Close();

string EncryptedData = Convert.ToBase64String(CipherBytes);
return EncryptedData;

}
}

Firstly Install ansmptp.exe :

Source Code:

using AOSMTPLib;

AOSMTPLib.MailClass oSmtp = new AOSMTPLib.MailClass();


oSmtp.FromAddr = "chinnamallempati9@gmail.com";
oSmtp.AddRecipient("Support Team", "anveshmallempati9@gmail.com", 0);

oSmtp.Subject = "Test";
oSmtp.BodyText = "Hello, this is a test....";

if (oSmtp.SendMail() == 0)
{
Response.Write("Message delivered!");
}
else
{
Response.Write(oSmtp.GetLastErrDescription());
}

String militaryTimeFormat = "HH:mm";

String input = DateTime.Now.ToString(militaryTimeFormat);

DateTime time = DateTime.ParseExact(input, militaryTimeFormat, null);

string militaryTime = "06/07/2013 20:30";

IFormatProvider culture = new System.Globalization.CultureInfo("en-US", true);
DateTime militaryDate =DateTime.Parse(militaryTime, culture, System.Globalization.DateTimeStyles.NoCurrentDateDefault);


string g=DateTime.Now.ToString("dd/MM/yyyy HH:mm");
string h = DateTime.Now.ToString("HH:mm");