Xamarin Forms is great if you want to develop apps for different mobile platforms. But when it comes to touch gestures, it is still very limited.
For more than a year they only had the TapGestureRecognizer. Although they did add some others lately, they still don't provide all information which you need. Furthermore the API which they use has been copied from iOS and is not what a .NET developer would expect.

GhostDoc is a Visual Studio extension that automatically generates XML documentation comments for methods and properties based on their type, parameters, name, and other contextual information. When generating documentation for class derived from a base class or for interface implementation (e.g. .NET Framework or your custom framework), GhostDoc will use the documentation that Microsoft or the framework vendor has already written for the base class or interface.

Native access to Excel files. The user doesn't need to have Excel, or any other software installed. XLSReadWriteII uses it's own memory manager that is optimized for storing cell values. This means that you can work with larger files. If your files still not will fit in memory, there is a Direct Read and Direct Write modes that let you process files on disc. Stability. One of the major goals with XLSReadWriteII was to create a product that won't corrupt the Excel files and won't alter any data in the file. The engine that handles XLSX files is automatically built directly from the file format specifications with our special developed tool. This will ensure maximum comatibility.

The Ultimate Solution When You Need To Access Excel Files With Delphi and C++ Builder. XLSReadWriteII 5 works with Delphi/C++Builder/RAD Studio 5 to Delphi 10. Firemonkey (Win and OSX) is supported.

The Ultimate Solution When You Need To Access Excel Files With Delphi and C++ Builder. XLSReadWriteII 5 works with Delphi/C++Builder/RAD Studio 5 to XE8. Firemonkey (Win and OSX) is supported.