I have a form with a DataGridView which has a column for angles. I format the angle to display how the user's angle units are set which works just fine. I also allow the user to output the data to a file or a printer. The output to printer looks exactly like it does in the form, the output to a file does as well: ,0.000,S 61°10' 24" W,3.580, That is a portion of a line opened in Notepad. However, when the same file is opened in Excel, the angle column has an extra character inserted: S 61°10' 24" W
Now, if I remove that character in Excel, save, close, reopen, it looks just fine and looks the same in Notepad as it did before. So why is Excel treating the initial file differently than the one it saved? In my form's tools to convert the angle from Radians to Degrees it first creates a string like so: DDdMM'SS" then replaces the d with the degree symbol using this: value = Regex.Replace(value, @"d", @"°");
Any suggestions on what I must do to get Excel to not add that  to the string?