Type Casting in C# .Net
Type casting is a concept of converting from one data type into another data type.C# supports two types of type casting
a) Implicit type casting
under control of CLR
Lower to higher
b) Explicit type casting
under control of programmer
higher to lower
Observations
Byte to long 
implicit
Int to byte Explicit
Int to float implicit
Float to int explicit
C # supports 4 types of Explicit type casting technique
C ++ style of type casting
Converting
Boxing and un boxing
Parsing
Working with C++ style of type casting
Ex :- int I = 10;
Byte b = (byte) I;
Syntax
DT1 V1 = value;
DT2 V2 = (DT2) V1;
Example on C++ Style of type casting
Open console application project
Write the following code in main method
Int I = 150;
Byte Sal = (byte) I ;
Console . Write Line (Sal);
Console. Read Line ();
Execute the project (f5) à 150
Observations
In C++ style of typecasting, there is a possibility for loading the data.
Convert
Convert is pre- defined class, which is the part of F
Working with convert class is called as “Converting”
Class contains of set of methods.
Predefined methods on convert class
String x = 123
Byte b = convert. To Byte (X);
Convert. To Byte (value)
Convert. To char (value)
Convert. To string (value)
Convert. To Boolean (value)
Convert. To Float (value)
*
*
*
*
Convert. To INT 16()…………….. for short
Convert. To INT 32()…………….. for int
Convert. To INT 46()…………….. for long
Example on converting
Open Console application project
Write the following code in main method
Class Program
{
Static void main (string [] args)
{
For (int I = 0;I < = 255; I ++)
{
Char c = Convert. To char (i);
Console. write (c);
}
Console . Read line ();
}
}
F5
Working with Boxing and Un Boxing
Boxing is a concept of converting value type in to reference types.
Un Boxing is a concept of converting reference type in to value types.
Note
Console application are especially designed for character based operating system like DOS
As of now, CLR software is not yet introduced for DOS OS, hence console Applications are not Executable in DOS OS.
Console Application contains only LOGIC . but not GUI
In order to develop GUI , Applications Microsoft introduced “Windows forms application” template.