C#

public class H2G2
{
  private const int Answer = 42;
  public H2G2()
  {
    Console.WriteLine("The answer to Life, the Universe, Everything is {0}", Answer);
  }
}

public class TaxCalc
{
  private readonly double taxRate;
  public TaxCalc(double taxRate)
  {
    this.taxRate = taxRate;
  }

  public void Calculate(double value)
  {
    double total = value * taxRate; // Note that taxRate cannot change now that it has been set.
      // this means you can't do something like this --taxRate;
    Console.WriteLine("The total is {0}", total);
  }
}

Pete O'Hanlon wrote:

There's a subtle difference between readonly and const which it sort of emulates. If you like, you can think of readonly as a runtime constant as opposed to const which is a compile time constant.

eng.iris wrote:

when delay button clicked i move the current record to another datatabbe and after 2 min i restore it back to the original datatable

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

Eddy Vluggen wrote:

Wait, what?

eng.iris wrote:

may be my idea was not good

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

eng.iris wrote:

i dont get ur idea

CREATE TABLE A (
pationt_no   BIGINT
pationt_name VARCHAR(250)
test_time    DATETIME)

CREATE TABLE B (
pationt_no   BIGINT
pationt_name VARCHAR(250)
test_time    DATETIME)

CREATE TABLE A (
pationt_no   BIGINT
pationt_name VARCHAR(250)
test_time    DATETIME
IsInTableB   BIT)

SELECT *
   FROM A
  WHERE IsInTableB = False

eng.iris wrote:

when delay button clicked i move the current record to another datatabbe and after 2 min i restore it back to the original datatable but unfortunately i get an error

"that deleted records cant be inserted " ? even if i refreshed my datasource

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

public class Point
{
    int x;
    int y;

    public Point(int x, int y)
    {
        this.x = x;    //this.x means the instance public member x, assigned to the method parameter x
        this.y = y;
    }
}

Point p = new Point(5,10);

this

Car lamborghini = new Car();
Car ferrari = new Car():

Car lamborghini = new Car("pitch black");
Car ferrari = new Car("pomegranate red"):
//assume color is public you can get to it by using the class instance:
lamborghini.color = "Le Mans blue";
ferrari.color = "Purple";

String cartype = Car.type;  //if type is public