Simple use of interfaces

Interface

An interface defines a protocol. Classes or structures that implement interfaces must comply with their agreements. The statement takes the following form:
[Attributes] [Modifiers]Interface Identifier[:Base-list]{Interface-body}[;]

Where:

Attributes(Optional)

Additional declarative information. For more information about attributes and attribute classes, see .

Modifiers(Optional)

The allowed modifiers include new and four access modifiers.

Identifier

Interface Name.

Base-list(Optional)

Contains a list of one or more explicit basic interfaces separated by commas.

Interface-body

Declaration of interface members.

Public interface idinterface
{
Dataset getmanytable (string [] selectsql, string [] tablename );
Void excutesqlcommand (string sqlcommandstring );
}

Public class classdata: idinterface
{
Public dataset getmanytable (string [] selectsql, string [] tablename)
{
................
// Skip the intermediate implementation process
..........
}
Public void excutesqlcommand (string strsqlcmd)
{
// Skip the intermediate implementation process
}
}