#37 CapabilityReader should not throw for no data

NTwain/CapabilityReader.cs

@@ -35,18 +35,19 @@ namespace NTwain
         /// <param name="capability">The capability.</param>
         /// <param name="memoryManager">The memory manager.</param>
         /// <returns></returns>
-        /// <exception cref="System.ArgumentNullException">capability
+        /// <exception cref="System.ArgumentNullException">
+        /// capability
         /// or
-        /// platformInfo</exception>
+        /// memoryManager
-        /// <exception cref="System.ArgumentException">Capability contains no data.;capability
+        /// </exception>
-        /// or
+        /// <exception cref="System.ArgumentException">capability</exception>
-        /// capability</exception>
         public static CapabilityReader ReadValue(TWCapability capability, IMemoryManager memoryManager)
         {
             if (capability == null) { throw new ArgumentNullException("capability"); }
-            if (capability.Container == IntPtr.Zero) { throw new ArgumentException(Resources.CapHasNoData, "capability"); }
             if (memoryManager == null) { throw new ArgumentNullException("memoryManager"); }
 
+            if (capability.Container != IntPtr.Zero)
+            {
                 IntPtr baseAddr = IntPtr.Zero;
                 try
                 {
@@ -86,6 +87,11 @@ namespace NTwain
                     }
                 }
             }
+            else
+            {
+                return new CapabilityReader();
+            }
+        }
 
         #region common prop
 

NTwain/Properties/VersionInfo.cs

@@ -23,7 +23,7 @@ namespace NTwain
         /// <summary>
         /// The build release version number.
         /// </summary>
-        public const string Build = "3.2.8"; // change this for each nuget release
+        public const string Build = "3.3.0"; // change this for each nuget release
 
 
     }