System.Decimal d = new System.Decimal(yourfloat);
String s = d.ToString("C");

The easiest way I see to do it is the above.  Create a System.Decimal object
from your float, and then use the "c" argument in the toString method of
Decimal to format it as currency.

Please use System.String.Format( "{0:#.00}", System.Convert.ToDecimal(
value ) ) to format the number of digits.

{0 = the parameter index. We only have 1 parameter so this will always be 0.
# = the value, it does not matter how many digits.
0 = represents a digit.

Example:

//double value = 1.2344567;
double value = 111.2;

String s_value = System.String.Format( "{0:#.00}",
System.Convert.ToDecimal( value ) );

System.Console.WriteLine( "The value is: " + s_value );

output:
The value is: 111.20

Eg
String s_value = System.String.Format( "{0:#.000}",
System.Convert.ToDecimal( value ) );

Will give:
The value is: 111.200

Regards,
Lars-Inge T?nnessen