Commonly used interfaces in .Net

Commonly used interfaces
Class Description

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

IDisposable
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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.

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

ICloneable
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Supports copying an object.

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