----------------------------Program 1--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
Employee[] e1 = new Employee[3];
e1[0] = new Employee
{
Name = "Anurag",
Age =
21,
Sex = 1
};
e1[1] = new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
};
e1[2] = new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
};
foreach (Employee emp in
e1)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}//main
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}//class that has main
}//namespace
----------------------------Program 2--------------------------------------------
Employee[] e1 = new Employee[2];
If you add only one employee
Error
----------------------------Program 3--------------------------------------------
So better solution is to use
list
List<Employee> ls = new
List<Employee>();
ls.Add(new
Employee()
{
Name = "Anurag",
Age = 21,
Sex = 1
});
ls.Add(new
Employee()
{
Name = "Abhi",
Age = 21,
Sex = 1
});
----------------------------Program 4--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
List<Employee> ls = new
List<Employee>();
ls.Add(new
Employee()
{
Name = "Anurag",
Age = 21,
Sex = 1
});
ls.Add(new
Employee()
{
Name = "Abhi",
Age = 21,
Sex = 1
});
foreach
(Employee emp in
ls)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 5--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
Employee[]
e1 = new Employee[3]
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
foreach
(Employee emp in
e1)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 6--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
//this is same as like
//int[] marks = new
int[5] {1,2,3,4,5}
Employee[]
e1 = new Employee[3]
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
foreach
(Employee emp in
e1)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 7--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
//this is
same as like
//int[]
marks = new int[5] {1,2,3,4,5}
Employee[]
e1 = new Employee[3]
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
Employee[] e2 = e1;
foreach
(Employee emp in
e2)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 8--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
//this is
same as like
//int[]
marks = new int[5] {1,2,3,4,5}
List<Employee> ls = null;
Employee[]
e1 = new Employee[3]
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
Employee[] e2 = e1;
ls = new
List<Employee>(e2);
foreach
(Employee emp in
ls)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 9--------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
//this is same as like
//int[]
marks = new int[5] {1,2,3,4,5}
List<Employee> ls = new
List<Employee>()
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
//ls =
new List<Employee>(e2);
foreach
(Employee emp in
ls)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case
0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 10-------------------------------------------
To count the length of list
int length = ls.Count;
----------------------------Program 11-------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public class Employee
{
public string Name { get; set; }
public int Age { get; set; }
public int Sex { get; set; }
}
class Program
{
static void Main(string[]
args)
{
//this is
same as like
//int[]
marks = new int[5] {1,2,3,4,5}
Employee[]
e1= new Employee[3];
List<Employee> ls = new
List<Employee>()
{
new
Employee
{
Name = "Anurag",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Abhishek",
Age = 21,
Sex = 1
},
new
Employee
{
Name = "Sita",
Age = 22,
Sex = 2
}
};
//to convert list to array
Employee[] e2 = ls.ToArray();
//ls =
new List<Employee>(e2);
foreach
(Employee emp in
e2)
{
Console.WriteLine("Employee Detail is : {0},{1},{2}",
emp.Name, emp.Age, Gender(emp.Sex));
}
Console.ReadLine();
}
public static string Gender(int gender)
{
switch
(gender)
{
case
1:
return
"Male";
case
2:
return
"Female";
case 0:
return
"Unknown";
default:
return
"invalid data";
}
}
}
}
----------------------------Program 12-------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace oops1
{
public enum RGB
{
red,
blue,
green
}
class Program
{
static void Main(string[]
args)
{
int[]
values = (int[])Enum.GetValues(typeof(RGB));
foreach
(int a in
values)
{
Console.WriteLine(a);//0 1 2
}
string[]
Names = Enum.GetNames(typeof(RGB));
foreach
(string str in
Names)
{
Console.WriteLine(str);// red blue green
}
Console.ReadLine();
}
}
}
----------------------------Program 13------------------------------------------
----------------------------Program 16-------------------------------------------
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace ENUM
{
enum rgbvalues : int
{
blue = 598,
green,
red
}
class Program
{
static void Main(string[]
args)
{
rgbvalues
rgb1 = rgbvalues.blue;
rgbvalues
rgb2 = rgbvalues.green;
rgbvalues
rgb3 = rgbvalues.red;
Console.WriteLine(rgb1);//blue[you cannot make same variable for the three...]
Console.WriteLine(rgb2);//green
Console.WriteLine(rgb3);//red
int
a = (int)rgb1;
int
b = (int)rgb2;
int
c = (int)rgb3;
Console.WriteLine(a);//598
Console.WriteLine(b);//599
Console.WriteLine(c);//600
Console.ReadLine();
}
}
}
//this is very
simple......look at this you will get to know......
//if i
initialise the 1st two and leave the last
//then the last follows the
previous one.............
