https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2015/11/16/suggestion-add-support-for-constants-in-c-and-vb-net-etc-interfaces.aspxIt is rather unfortunate that C# doesn’t support constants in interfaces, whereas Java does. If IL (intermediate language) that C# usually compiles to (when not using AOT that is like in .NET Native or Xamarin iOS) doesn’t support this, thenelCommunityServer 2.1 SP3 (Build: 20423.1)