how to create a file in specific path and write to it in c# code example

Example: create a file in the directory of the exe and write to it c#

string GuarnteedWritePath = System.Environment.
                             GetFolderPath(
                                 Environment.SpecialFolder.CommonApplicationData
                             );
            string FilePath = Path.Combine(GuarnteedWritePath, "LogFile.txt");