How to disable popping up "Convert File" dialog while opening .rtf documents?

When I trying to open a Rich Text Format document (*.rtf) the following dialog is appearing:

How to open *.rtf files without showing this "Convert File" dialog?

Version: Microsoft Word 2016.

Update: I found the same question on the stackoverflow.com. But this topic is related to case when document is opening from the c# application:

How to open a RTF file with C# without showing the Microsoft Word “Convert File” dialog?

Solution 1:

Word should open a real RTF document without asking any question.

This dialog appears when the file being opened cannot be automatically identified by Word as having a format it can understand, so it asks for your help.

It seems that your RTF file or files are badly constructed.

You may test this by saving the file, still in RTF format, then open the new file. If the dialog appears again, Office may be malfunctioning and needs to be repaired. If the dialog no longer appears, then the original file is malformed.