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

		public static string ChangeExtension (string path, string extension)
		{
			if (path == null)
				return null;

			if (path.IndexOfAny (InvalidPathChars) != -1)
				throw new ArgumentException ("Illegal characters in path.");

			int iExt = findExtension (path);

			if (extension == null)
				return iExt < 0 ? path : path.Substring (0, iExt);
			else if (extension.Length == 0)
				return iExt < 0 ? path + '.' : path.Substring (0, iExt + 1);

			else if (path.Length != 0) {
				if (extension.Length > 0 && extension [0] != '.')
					extension = "." + extension;
			} else
				extension = String.Empty;
			
			if (iExt < 0) {
				return path + extension;
			} else if (iExt > 0) {
				string temp = path.Substring (0, iExt);
				return temp + extension;
			}

			return extension;
		}