You can work with any ASCII file in MapInfo Pro, it must be delimited using a space, tab, comma, or another special character that separates one field from another. Before opening a delimited ASCII file, you must know the delimiter in use and whether or not to use the file's first line as column headings. You can check this by opening the file in any text editor, such as NotePad.
If you are working with a CSV file, it must be comma delimited to open it in MapInfo Pro.
If you want to place the point data in your CSV file on to a map, then follow these instructions to open a CSV file in MapInfo Pro and then proceed to Putting Latitude/Longitude Coordinates on a Map.