error CS0535: 'InRoomCallbacksContainer' does not implement interface member code example

Example: c# error CS0535

/*			error CS0535: Sedan does not implement 
			interface member 'IAutomobile.LicensePlate'				*/

class Sedan : IAutomobile
{
}							//Causes Error

class Sedan : IAutomobile
{
  public string LicensePlate
  { get; }

  // and so on...
}							//Define the members of the interface