C# Type casting

Type conversion is basically type casting or
converting one type of data to another type.

In C#, type casting has two forms:

1. Implicit type conversion - these conversions are performed by C# in a type-safe manner.
                      Examples are conversions from
smaller to larger integral types and
conversions from derived classes to base
classes.

2. Explicit type conversion - these conversionsare done explicitly by users using the pre-defined functions. Explicit conversions require a cast operator.

The following example shows an explicit type
conversion:

namespace TypeConversionApplication
{
class ExplicitConversion
{
static void Main(string[] ar
{
double d = 5673.74 ;
int i ;
// cast double to int.
i = ( int ) d;
Console . WriteLine( i );
Console . ReadKey();
}
}
}

When the above code is compiled and executed, it produces the following result:

5673

**C # Type Conversion Methods
C# provides the following built-in type conversion methods:

S.N Methods & Description
1 .ToBoolean
          Converts a type to a Boolean value, where possible.

2. ToByte
          Converts a type to a byte.

3. ToChar
          Converts a type to a single Unicode
character, where possible.

4. ToDateTime
          Converts a type (integer or string type) to date-time structures.

5. ToDecimal
          Converts a floating point or integer type to a decimal type.

6. ToDouble
           Converts a type to a double type.

7. ToInt16
            Converts a type to a 16-bit integer.

8. ToInt32
            Converts a type to a 32-bit integer.

9. ToInt64
            Converts a type to a 64-bit integer.

10. ToSbyte
           Converts a type to a signed byte type.

11. ToSingle
            Converts a type to a small floating point number.

12. ToString
             Converts a type to a string.

13. ToType
             Converts a type to a specified type.

The following example converts various value types to string type:

namespace TypeConversionApplication
{
class StringConversion
{
static void Main(string[] ar
{
int i = 75;
float f = 53.005f ;
double d = 2345.7652 ;
bool b = true;
Console . WriteLine( i . ToSt
Console . WriteLine( f . ToSt
Console . WriteLine( d . ToSt
Console . WriteLine( b . ToSt
Console . ReadKey();
}
}
}

When the above code is compiled and executed, it produces the following result:

75
53.005
2345.7652
True