Modern UI, Loading screen CanRunMessages

src/Providers/FileTime.Providers.Local/Interop/WindowsInterop.cs

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+using System.Runtime.InteropServices;
+
+namespace FileTime.Providers.Local.Interop
+{
+    //https://stackoverflow.com/questions/3282418/send-a-file-to-the-recycle-bin
+    public static class WindowsInterop
+    {
+        /// <summary>
+        /// Possible flags for the SHFileOperation method.
+        /// </summary>
+        [Flags]
+        public enum FileOperationFlags : ushort
+        {
+            /// <summary>
+            /// Do not show a dialog during the process
+            /// </summary>
+            FOF_SILENT = 0x0004,
+            /// <summary>
+            /// Do not ask the user to confirm selection
+            /// </summary>
+            FOF_NOCONFIRMATION = 0x0010,
+            /// <summary>
+            /// Delete the file to the recycle bin.  (Required flag to send a file to the bin
+            /// </summary>
+            FOF_ALLOWUNDO = 0x0040,
+            /// <summary>
+            /// Do not show the names of the files or folders that are being recycled.
+            /// </summary>
+            FOF_SIMPLEPROGRESS = 0x0100,
+            /// <summary>
+            /// Surpress errors, if any occur during the process.
+            /// </summary>
+            FOF_NOERRORUI = 0x0400,
+            /// <summary>
+            /// Warn if files are too big to fit in the recycle bin and will need
+            /// to be deleted completely.
+            /// </summary>
+            FOF_WANTNUKEWARNING = 0x4000,
+        }
+
+        /// <summary>
+        /// File Operation Function Type for SHFileOperation
+        /// </summary>
+        public enum FileOperationType : uint
+        {
+            /// <summary>
+            /// Move the objects
+            /// </summary>
+            FO_MOVE = 0x0001,
+            /// <summary>
+            /// Copy the objects
+            /// </summary>
+            FO_COPY = 0x0002,
+            /// <summary>
+            /// Delete (or recycle) the objects
+            /// </summary>
+            FO_DELETE = 0x0003,
+            /// <summary>
+            /// Rename the object(s)
+            /// </summary>
+            FO_RENAME = 0x0004,
+        }
+
+
+
+        /// <summary>
+        /// SHFILEOPSTRUCT for SHFileOperation from COM
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+        private struct SHFILEOPSTRUCT
+        {
+
+            public IntPtr hwnd;
+            [MarshalAs(UnmanagedType.U4)]
+            public FileOperationType wFunc;
+            public string pFrom;
+            public string pTo;
+            public FileOperationFlags fFlags;
+            [MarshalAs(UnmanagedType.Bool)]
+            public bool fAnyOperationsAborted;
+            public IntPtr hNameMappings;
+            public string lpszProgressTitle;
+        }
+
+        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
+        private static extern int SHFileOperation(ref SHFILEOPSTRUCT FileOp);
+
+        /// <summary>
+        /// Send file to recycle bin
+        /// </summary>
+        /// <param name="path">Location of directory or file to recycle</param>
+        /// <param name="flags">FileOperationFlags to add in addition to FOF_ALLOWUNDO</param>
+        public static bool Send(string path, FileOperationFlags flags)
+        {
+            try
+            {
+                var fs = new SHFILEOPSTRUCT
+                {
+                    wFunc = FileOperationType.FO_DELETE,
+                    pFrom = path + '\0' + '\0',
+                    fFlags = FileOperationFlags.FOF_ALLOWUNDO | flags
+                };
+                SHFileOperation(ref fs);
+                return true;
+            }
+            catch (Exception)
+            {
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// Send file to recycle bin.  Display dialog, display warning if files are too big to fit (FOF_WANTNUKEWARNING)
+        /// </summary>
+        /// <param name="path">Location of directory or file to recycle</param>
+        public static bool Send(string path)
+        {
+            return Send(path, FileOperationFlags.FOF_NOCONFIRMATION | FileOperationFlags.FOF_WANTNUKEWARNING);
+        }
+
+        /// <summary>
+        /// Send file silently to recycle bin.  Surpress dialog, surpress errors, delete if too large.
+        /// </summary>
+        /// <param name="path">Location of directory or file to recycle</param>
+        public static bool MoveToRecycleBin(string path)
+        {
+            return Send(path, FileOperationFlags.FOF_NOCONFIRMATION | FileOperationFlags.FOF_NOERRORUI | FileOperationFlags.FOF_SILENT);
+
+        }
+
+        private static bool deleteFile(string path, FileOperationFlags flags)
+        {
+            try
+            {
+                var fs = new SHFILEOPSTRUCT
+                {
+                    wFunc = FileOperationType.FO_DELETE,
+                    pFrom = path + '\0' + '\0',
+                    fFlags = flags
+                };
+                SHFileOperation(ref fs);
+                return true;
+            }
+            catch (Exception)
+            {
+                return false;
+            }
+        }
+
+        public static bool DeleteCompletelySilent(string path)
+        {
+            return deleteFile(path,
+                              FileOperationFlags.FOF_NOCONFIRMATION | FileOperationFlags.FOF_NOERRORUI |
+                              FileOperationFlags.FOF_SILENT);
+        }
+    }
+}