public async Task<Message> UpdateMessageAsync(string roomId, string messageId, string message)
{
string url = _baseApiAddress + $"rooms/{roomId}/chatMessages/{messageId}";
#if __IOS__ || __ANDROID__ || NET45
var content = new FormUrlEncodedContent(new Dictionary<string, string>
{
{"text", message}
});
#endif
#if NETFX_CORE
var content = new HttpFormUrlEncodedContent(new Dictionary<string, string>
{
{"text", message}
});
#endif
return await HttpClient.PutAsync<Message>(url, content);
}