Fixed #133

Author: ENikS

package.props

@@ -1,7 +1,7 @@
 <Project>
 
   <PropertyGroup>
-    <VersionBase>5.9.0</VersionBase>
+    <VersionBase>5.9.1</VersionBase>
     <PackageReleaseNotes>This package is compatible with .NET Standard 1.0 and 2.0, .NET Core 1.0 and 2.0, .NET 4.0, 4.5, 4.6, 4.7</PackageReleaseNotes>
   </PropertyGroup>
 

src/Builder/Context/BuilderContext.cs

@@ -115,6 +115,8 @@ public void Clear(Type type, string name, Type policyInterface)
         public SynchronizedLifetimeManager RequiresRecovery;
 
         public bool BuildComplete;
+
+        public Type DeclaringType;
 #if !NET40
         public IntPtr Parent;
 #endif
@@ -140,6 +142,7 @@ public object Resolve(Type type, string name, InternalRegistration registration)
                     ExecutePlan = ExecutePlan,
                     List = List,
                     Overrides = Overrides,
+                    DeclaringType = Type,
 #if !NET40
                     Parent = new IntPtr(Unsafe.AsPointer(ref thisContext))
 #endif

src/Processors/Parameters/ParametersDiagnostic.cs

@@ -25,7 +25,7 @@ protected virtual IEnumerable<Expression> CreateDiagnosticParameterExpressions(P
 
 #if NET40
                 Expression defaultValueExpr = null;
-                if (true)
+                if (parameter.DefaultValue is DBNull)
 #else
                 var defaultValueExpr = parameter.HasDefaultValue
                     ? Expression.Constant(parameter.DefaultValue, parameter.ParameterType)