Harden disposal paths and test project metadata

DynamORM/Helpers/Dynamics/DynamicParser.cs

@@ -1444,15 +1444,18 @@ namespace DynamORM.Helpers.Dynamics
         /// <summary>Gets a value indicating whether this instance is disposed.</summary>
         public bool IsDisposed { get; private set; }
 
-        /// <summary>
-        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
-        /// </summary>
-        public void Dispose()
-        {
-            IsDisposed = true;
-
-            if (_uncertainResult != null)
-            {
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
+        /// </summary>
+        public void Dispose()
+        {
+            if (IsDisposed)
+                return;
+
+            IsDisposed = true;
+
+            if (_uncertainResult != null)
+            {
                 if (_uncertainResult is Node)
                     ((Node)_uncertainResult).Dispose();
 
@@ -1486,4 +1489,4 @@ namespace DynamORM.Helpers.Dynamics
 
         #endregion Implementation of IExtendedDisposable
     }
-}
+}