System.IO.Path.ChangeExtension C# (CSharp) Méthode

        public static string ChangeExtension(string path, string extension)
        {
            if (path != null)
            {
                PathInternal.CheckInvalidPathChars(path);

                string s = path;
                for (int i = path.Length - 1; i >= 0; i--)
                {
                    char ch = path[i];
                    if (ch == '.')
                    {
                        s = path.Substring(0, i);
                        break;
                    }
                    if (PathInternal.IsDirectoryOrVolumeSeparator(ch)) break;
                }

                if (extension != null && path.Length != 0)
                {
                    s = (extension.Length == 0 || extension[0] != '.') ?
                        s + "." + extension :
                        s + extension;
                }

                return s;
            }
            return null;
        }

        public string GetPathForNewVideo()
        {
            var tempFile      = Path.GetFileNameWithoutExtension(Path.GetRandomFileName());
            var tempVideoFile = Path.ChangeExtension(tempFile, CommonConstants.VIDEO_EXTENSION);

            return(Path.Combine(LOCAL_VIDEO_LOCATION, tempVideoFile));
        }