static async Task UpdateListAsync(TwitterContext twitterCtx) { string ownerScreenName = "Linq2Twitr"; ulong listID = 0; List list = await twitterCtx.UpdateListAsync( listID, "testDemo", "Test List", 0, ownerScreenName, "public", "This is a test2"); if (list != null) Console.WriteLine("List Name: {0}, Description: {1}", list.Name, list.Description); }