uwp: Make exceptions internal and set HRESULT

Author: angularsen

UnitsNet/AmbiguousUnitParseException.cs

@@ -23,14 +23,21 @@
 
 namespace UnitsNet
 {
-    public class AmbiguousUnitParseException : UnitsNetException
+#if WINDOWS_UWP
+    internal
+#else
+    public 
+#endif
+        class AmbiguousUnitParseException : UnitsNetException
     {
         public AmbiguousUnitParseException(string message) : base(message)
         {
+            HResult = 2;
         }
 
         public AmbiguousUnitParseException(string message, Exception innerException) : base(message, innerException)
         {
+            HResult = 2;
         }
     }
 }

UnitsNet/UnitsNetException.cs

@@ -23,18 +23,26 @@
 
 namespace UnitsNet
 {
-    public class UnitsNetException : Exception
+#if WINDOWS_UWP
+    internal
+#else
+    public 
+#endif
+        class UnitsNetException : Exception
     {
         public UnitsNetException()
         {
+            HResult = 1;
         }
 
         public UnitsNetException(string message) : base(message)
         {
+            HResult = 1;
         }
 
         public UnitsNetException(string message, Exception innerException) : base(message, innerException)
         {
+            HResult = 1;
         }
     }
 }