GitScc.GitRepository.AddIgnoreItem C# (CSharp) Method

        public void AddIgnoreItem(string fileName)
        {
            if (string.IsNullOrWhiteSpace(fileName)) return;

            fileName = fileName.Replace("\\", "/");

            var ignoreFile = Path.Combine(WorkingDirectory, ".gitignore");
            if (!File.Exists(ignoreFile))
            {
                using (StreamWriter sw = File.CreateText(ignoreFile))
                {
                    sw.WriteLine(fileName);
                }
            }
            else
            {
                using (StreamWriter sw = File.AppendText(ignoreFile))
                {
                    sw.WriteLine();
                    sw.Write(fileName);
                }
            }
        }