Commonly Used Interfaces .NET Framework

Some commonly used interfaces in the .NET Framework

IComparable
Implemented by types whose values can be ordered; for example, the numeric and string classes. IComparable is required for sorting.

IDisposable
Defines methods for manually disposing of an object. This interface is important for large objects that consume resources, or objects that lock access to resources such as databases.

IConvertable
Enables a class to be converted to a base type such as Boolean, Byte, Double or String.

ICloneable
Supports copying an object.

IEquatable
Allows you to compare to instances of a class for equality. For example, if you implement this interface, you could say 'if (a == b)'

IFormattable
Enables you to convert the value of an object into a specially formatted string. This provides greater flexibility than the base.ToString method.