Optimalization, file name&extension

src/Core/FileTime.Core/Timeline/TimeContainer.cs

@@ -125,5 +125,6 @@ namespace FileTime.Core.Timeline
         public Task<bool> CanOpen() => Task.FromResult(true);
 
         public void Dispose() => IsDisposed = true;
+        public void Unload() { }
     }
 }

src/Core/FileTime.Core/Timeline/TimeProvider.cs

@@ -94,5 +94,7 @@ namespace FileTime.Core.Timeline
         public Task<bool> CanOpen() => Task.FromResult(true);
 
         public void Dispose() { }
+
+        public void Unload() { }
     }
 }