Merge pull request #28 from dutts/patch-1

An example of displaying request headers on Client

Author: Matt Bernier

TROUBLESHOOTING.md

@@ -0,0 +1,21 @@
+If you have a non-library SendGrid issue, please contact our [support team](https://support.sendgrid.com).
+
+If you can't find a solution below, please open an [issue](https://github.com/sendgrid/csharp-http-client/issues).
+
+## Table of Contents
+
+* [Viewing the Request Body](#request-body)
+
+<a name="request-body"></a>
+## Viewing the Request Body
+
+When debugging or testing, it may be useful to examine the raw request body to compare against the [documented format](https://sendgrid.com/docs/API_Reference/api_v3.html).
+
+e.g. on a Client instance, myClient.
+
+```csharp
+foreach (KeyValuePair<DateTime, string> kvp in myClient.RequestHeaders)
+{
+    Console.WriteLine("Name = {0}, Value = {1}", kvp.Key, kvp.Value);
+}
+```