' create a folder||xui.SetDataFolder("projectname")||File.MakeDir(xui.DefaultFolder,"subfoldername")||codefolder = File.DirData("project") & "\subfoldername"||
' select a file||fchoose.InitialDirectory = projectfolder||fchoose.SetExtensionFilter("Textfiles",Array As String("*.txt"))||Dim filename As String = fchoose.ShowOpen(B4XPages.GetNativeParent(B4XPages.MainPage))||If filename <> "" Then||	Dim path As String = filename.SubString2(0,filename.LastIndexOf("\"))||	Dim fname As String = filename.SubString(filename.LastIndexOf("\")+1)||	File. ...||End If||End Sub
' save a file||fchoose.InitialFileName = "filename"||fchoose.InitialDirectory = projectfolder||fchoose.SetExtensionFilter("Textfiles",Array As String("*.txt"))||Dim filename As String = fchoose.ShowSave(B4XPages.GetNativeParent(B4XPages.MainPage))||If filename <> "" Then||	Dim path As String = filename.SubString2(0,filename.LastIndexOf("\"))||	Dim fname As String = filename.SubString(filename.LastIndexOf("\")+1)||	File. ...||End If||
' read a file as string||Dim text As String||text = File.ReadString(path, fname)
' read a file as list||Dim lst As List||lst.Initialize||lst = File.ReadList(path,fname)||For i = 0 To lst.Size -1||	||Next
' read a file as map||Dim m As Map||m.Initialize||m = File.ReadMap(path, fname)
' write a string to a file||File.WriteString(path, "filename", "textstring")||
' write a list to a file||File.WriteList(path,fname,lst)||
' write a map to a file||File.WriteMap(path,fname,mmap)||