IFormattableCF 1.0, ECMA 1.0

System (mscorlib.dll)interface

This interface is implemented in your objects to provide a custom ToString( ) method that accepts a format string and an IFormatProvider instance. You can then use this information to determine how the return string should be rendered. All numeric value types in the System namespace implement this interface.

public interface IFormattable {
// Public Instance Methods
   public string ToString(string format, IFormatProvider formatProvider);

Implemented By

Multiple types

    Part II: Programming with the .NET Framework
    Part IV: API Quick Reference
    Chapter 26. System