what is interface in c#?

Hi Prakashraj,

An interface contains only the signatures of methods, delegates or events. The implementation of the methods is done in the class that implements the interface, as shown in the following example:

interface ISampleInterface
{
void SampleMethod();
}

class ImplementationClass : ISampleInterface
{
// Explicit interface member implementation:
void ISampleInterface.SampleMethod()
{
// Method implementation.
}

static void Main()
{
// Declare an interface instance.
ISampleInterface obj = new ImplementationClass();

// Call the member.
obj.SampleMethod();
}
}

Thanks & Regards,
Riju.