[FEAT] Adding in handling for secondary rate limit exceptions (#2473)

Octokit/Exceptions/SecondaryRateLimitExceededException.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+#if !NO_SERIALIZABLE
+using System.Runtime.Serialization;
+#endif
+
+namespace Octokit
+{
+    /// <summary>
+    /// Exception thrown when Secondary GitHub API Rate limits are exceeded.
+    /// </summary>
+    /// <summary>
+    /// <para>
+    /// This occurs when GitHub perceives misuse of the API. You may get this if
+    /// you are polling heavily, creating content rapidly or making concurrent requests.
+    /// </para>
+    /// <para>See https://docs.github.com/en/rest/overview/resources-in-the-rest-api#secondary-rate-limits for more details.</para>
+    /// </summary>
+#if !NO_SERIALIZABLE
+    [Serializable]
+#endif
+    [SuppressMessage("Microsoft.Design", "CA1032:ImplementStandardExceptionConstructors",
+        Justification = "These exceptions are specific to the GitHub API and not general purpose exceptions")]
+    public class SecondaryRateLimitExceededException : ForbiddenException
+    {
+        /// <summary>
+        /// Constructs an instance of the <see cref="Octokit.SecondaryRateLimitExceededException"/> class.
+        /// </summary>
+        /// <param name="response">The HTTP payload from the server</param>
+        public SecondaryRateLimitExceededException(IResponse response) : this(response, null)
+        {
+        }
+
+        /// <summary>
+        /// Constructs an instance of the <see cref="Octokit.SecondaryRateLimitExceededException"/> class.
+        /// </summary>
+        /// <param name="response">The HTTP payload from the server</param>
+        /// <param name="innerException">The inner exception</param>
+        public SecondaryRateLimitExceededException(IResponse response, Exception innerException) : base(response, innerException)
+        {
+            Ensure.ArgumentNotNull(response, nameof(response));
+        }
+
+        public override string Message
+        {
+            get { return ApiErrorMessageSafe ?? "Secondary API Rate Limit exceeded"; }
+        }
+
+#if !NO_SERIALIZABLE
+        /// <summary>
+        /// Constructs an instance of <see  cref="Octokit.SecondaryRateLimitExceededException"/>.
+        /// </summary>
+        /// <param name="info">
+        /// The <see cref="SerializationInfo"/> that holds the
+        /// serialized object data about the exception being thrown.
+        /// </param>
+        /// <param name="context">
+        /// The <see cref="StreamingContext"/> that contains
+        /// contextual information about the source or destination.
+        /// </param>
+        protected SecondaryRateLimitExceededException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+#endif
+    }
+}