Default parameters on interfaces.

interfacedifferentdefault.cs

// Default arguments in interfaces.
// If you call the interface method, the passed value will be "interface".
// If you call the object method, the passed value will be "method".
// Should the compiler error?

public interface IPipelineBuilder
{
    void AddStage(IPipelineStage stage, string mode = "interface");
}

public class PipelineBuilder : IPipelineBuilder
{
    public void AddStage(IPipelineStage stage, string mode = "method")
    {
       // Do something
    }
}