AlgoStudio features a Dictionary tool that has descriptions, classes and methods of C# that can be used for writing source code.
To open the Dictionary tool, click _ENG/mqlc/1.png)
button. The following window shows up:
On the right-hand side of the window you'll find the detailed information on the selected item. You can search for any desired item, subject, module, etc by using a search box in the top-left corner of the window.