Member bodies in an interface are the default implementation. These preceding member declarations typically don't contain a body. An interface declaration can contain declarations (signatures without any implementation) of the following members: ISampleInterface obj = new ImplementationClass() Īn interface can be a member of a namespace or a class. Explicit interface member implementation:
Example interface interface ISampleInterfaceĬlass ImplementationClass : ISampleInterface In the following example, class ImplementationClass must implement a method named SampleMethod that has no parameters and returns void.įor more information and examples, see Interfaces. Typically, static virtual methods declare that an implementation must define a set of overloaded operators. Beginning with C# 11, an interface may define static abstract or static virtual members to declare that an implementing type must provide the declared members. It may also define static members in order to provide a single implementation for common functionality. An interface may define a default implementation for members. Any class or struct that implements that contract must provide an implementation of the members defined in the interface.
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