Revit Ribbon Sample

This sample contains sample revit IExternalApplication, that contains creation of ribbon buttons in fluent style

        Ribbon.GetApplicationRibbon(application)
            .Tab("My tab")
            .Panel("My panel", new CamelCaseToUnderscoreWithPrefixNameConvention(Resources.CompanyName))
            .CreateButton<DummyCommand>("Just test", button =>
                button
                    .SetLargeImage(Resources.UndefinedIcon32)
                    .SetSmallImage(Resources.UndefinedIcon16)
                    .SetHelpUrl("https://github.com/CADBIMDeveloper/RevitRibbonSample"))
            .CreateSplitButton("MY_SPLIT_BTN", "Split\nbutton",
                splitButton =>
                    splitButton
                        .CreateButton<DummyCommand1>("Split button 1",
                            button => button
                                .SetLargeImage(Resources.Crazy32)
                                .SetSmallImage(Resources.Crazy16)
                                .SetLongDescription("I'm available only in plan views")
                                .SetAvailability<DummyCommand1>()
                                .SetDefault())
                        .CreateButton<DummyCommand2>("Split button 2",
                            button => button
                                .SetLargeImage(Resources.Biohazard_32)
                                .SetSmallImage(Resources.Biohazard_16)))
            .CreatePullDownButton("MY_PULLDOWN_BTN", "Pulldown\nbutton",
                pulldownButton =>
                    pulldownButton
                        .CreateButton<DummyCommand3>("Command 3")
                        .CreateButton<DummyCommand4>("Command 4")
                        .SetLargeImage(Resources.metro32)
                        .SetSmallImage(Resources.metro16))
            .CreateSeparator()
            .CreateStackedItems(item =>
                item
                    .CreateButton<DummyCommand5>("Command 5",
                        button =>
                            button
                                .SetLargeImage(Resources.exportDWG_32)
                                .SetSmallImage(Resources.exportDWG_16))
                    .CreateButton<DummyCommand6>("Command 6",
                        button => 
                            button
                                .SetLargeImage(Resources.export_32)
                                .SetSmallImage(Resources.export_16))
                    .CreateButton<DummyCommand7>("Command 7",
                        button => 
                            button
                                .SetLargeImage(Resources.acad_import_32)
                                .SetSmallImage(Resources.acad_import_16)));

Project RevitUtils, that allows creation of ribon items in fluent style originated from Victor's VCRevitRibbonUtil https://github.com/chekalin-v/VCRevitRibbonUtil, but it contains some improvements.

Moving to system tab algorithm is based on Jeremy's blogpost: http://thebuildingcoder.typepad.com/blog/2014/07/moving-an-external-command-button-within-the-ribbon.html