Error: Does not implement interface member

[tmccar]

namespace HelloWorld
    
{
   public class VaultFormsCmdExt : IExtension
    
   {
       public MyCustomTabControl tabControl;

       public static PropInst[] fileProperties = new PropInst[] { null };

        public static PropDef[] propDefs = new PropDef[] { null };

        public static File selectedFile = null;

I am getting this message when trying to build the solution:

"<filename> does not implement interface member ......IExtensio n.OnLogOff"


What might be causing this error?

[GaryTexmo]

It means exactly what it says :) You're inheriting from the interface IExtension, which defines a method called OnLogOff. The code you posted doesn't show you implementing this method. I don't now what the signature for IExtension.OnLo gOff is because you didn't post the code for it, but generally an interface works like this...

public interface IAnInterface
{
  void SomeMethod();
}

public class SomeClass : IAnInterface
{
  #region IAnInterface Implementation
  public void SomeMethod()
  {
    // Do something...
  }
  #endregion

  // The rest of your class here
}

If a method is defined in an interface and a class implements that interface, the class must implement that item.

[tmccar]

Thanks Gary, that explains it