URI 太长了

Question

在添加我得到的参数后，我正在使用 RestClient 和 RestRequest 发出请求

错误:

Invalid URI: The URI string is too long. 

我假设这与它没有正确发布数据有关，这是我的代码:

RestClient client = new RestClient();
client.BaseUrl = "URL";
client.Authenticator =
    new HttpBasicAuthenticator("api",
            "KEY");
RestRequest restRequest = new RestRequest(Method.POST);
restRequest.AddParameter("domain",
            "DOMAIN", ParameterType.UrlSegment);
restRequest.Resource = "{domain}/messages";
restRequest.AddParameter("from", (string) sender["alias"] + "<email>");
restRequest.AddParameter("to", (string)recipient["alias"] + "<" + (string)recipient["email"] + ">");
restRequest.AddParameter("subject", subject);
restRequest.AddParameter("html", body);              
var result = client.Execute(restRequest);
if (result.StatusCode != System.Net.HttpStatusCode.OK)
{
     throw new Exception(result.ErrorMessage,new Exception(result.StatusCode + " - " + result.StatusDescription));
}

body 参数可能很长，因为它是 HTML 电子邮件。出现上述错误的原因是什么？

这是代码使用较短主体发出的请求，以便它确实发送
http://pastebin.com/HgbBHVpC

完整的堆栈跟踪，包括尝试发送的消息 http://pastebin.com/dRhXire6

Answer 1

http://msdn.microsoft.com/en-us/library/z6c2z492.aspx

查看它说的文档
uriString 的长度超过 65519 个字符