Replace use of InitialDirectory in file dialogs.

src/Avalonia.Dialogs/ManagedFileChooserViewModel.cs

@@ -136,7 +136,7 @@ namespace Avalonia.Dialogs
                         : dialog is OpenFolderDialog ? "Select directory"
                         : throw new ArgumentException(nameof(dialog)));
 
-            var directory = dialog.InitialDirectory;
+            var directory = dialog.Directory;
 
             if (directory == null || !Directory.Exists(directory))
             {

src/Avalonia.Native/SystemDialogs.cs

@@ -28,7 +28,7 @@ namespace Avalonia.Native
                 _native.OpenFileDialog(nativeParent,
                                         events, ofd.AllowMultiple,
                                         ofd.Title ?? "",
-                                        ofd.InitialDirectory ?? "",
+                                        ofd.Directory ?? "",
                                         ofd.InitialFileName ?? "",
                                         string.Join(";", dialog.Filters.SelectMany(f => f.Extensions)));
             }
@@ -37,7 +37,7 @@ namespace Avalonia.Native
                 _native.SaveFileDialog(nativeParent,
                                         events,
                                         dialog.Title ?? "",
-                                        dialog.InitialDirectory ?? "",
+                                        dialog.Directory ?? "",
                                         dialog.InitialFileName ?? "",
                                         string.Join(";", dialog.Filters.SelectMany(f => f.Extensions)));
             }
@@ -51,7 +51,7 @@ namespace Avalonia.Native
 
             var nativeParent = GetNativeWindow(parent);
 
-            _native.SelectFolderDialog(nativeParent, events, dialog.Title ?? "", dialog.InitialDirectory ?? "");
+            _native.SelectFolderDialog(nativeParent, events, dialog.Title ?? "", dialog.Directory ?? "");
 
             return events.Task.ContinueWith(t => { events.Dispose(); return t.Result.FirstOrDefault(); });
         }

src/Avalonia.X11/NativeDialogs/GtkNativeFileDialogs.cs

@@ -112,7 +112,7 @@ namespace Avalonia.X11.NativeDialogs
                 () => ShowDialog(dialog.Title, platformImpl,
                     dialog is OpenFileDialog ? GtkFileChooserAction.Open : GtkFileChooserAction.Save,
                     (dialog as OpenFileDialog)?.AllowMultiple ?? false,
-                    Path.Combine(string.IsNullOrEmpty(dialog.InitialDirectory) ? "" : dialog.InitialDirectory,
+                    Path.Combine(string.IsNullOrEmpty(dialog.Directory) ? "" : dialog.Directory,
                         string.IsNullOrEmpty(dialog.InitialFileName) ? "" : dialog.InitialFileName), dialog.Filters));
         }
 
@@ -125,7 +125,7 @@ namespace Avalonia.X11.NativeDialogs
             return await await RunOnGlibThread(async () =>
             {
                 var res = await ShowDialog(dialog.Title, platformImpl,
-                    GtkFileChooserAction.SelectFolder, false, dialog.InitialDirectory, null);
+                    GtkFileChooserAction.SelectFolder, false, dialog.Directory, null);
                 return res?.FirstOrDefault();
             });
         }

src/Windows/Avalonia.Win32/SystemDialogImpl.cs

@@ -56,11 +56,11 @@ namespace Avalonia.Win32
                 frm.SetFileTypes((uint)filters.Count, filters.ToArray());
                 frm.SetFileTypeIndex(0);
 
-                if (dialog.InitialDirectory != null)
+                if (dialog.Directory != null)
                 {
                     UnmanagedMethods.IShellItem directoryShellItem;
                     Guid riid = UnmanagedMethods.ShellIds.IShellItem;
-                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.InitialDirectory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
+                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.Directory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
                     {
                         frm.SetFolder(directoryShellItem);
                         frm.SetDefaultFolder(directoryShellItem);
@@ -114,21 +114,21 @@ namespace Avalonia.Win32
                 options |= (uint)(UnmanagedMethods.FOS.FOS_PICKFOLDERS | DefaultDialogOptions);
                 frm.SetOptions(options);
 
-                if (dialog.InitialDirectory != null)
+                if (dialog.Directory != null)
                 {
                     UnmanagedMethods.IShellItem directoryShellItem;
                     Guid riid = UnmanagedMethods.ShellIds.IShellItem;
-                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.InitialDirectory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
+                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.Directory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
                     {
                         frm.SetFolder(directoryShellItem);
                     }
                 }
 
-                if (dialog.DefaultDirectory != null)
+                if (dialog.Directory != null)
                 {
                     UnmanagedMethods.IShellItem directoryShellItem;
                     Guid riid = UnmanagedMethods.ShellIds.IShellItem;
-                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.DefaultDirectory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
+                    if (UnmanagedMethods.SHCreateItemFromParsingName(dialog.Directory, IntPtr.Zero, ref riid, out directoryShellItem) == (uint)UnmanagedMethods.HRESULT.S_OK)
                     {
                         frm.SetDefaultFolder(directoryShellItem);
                     }