Set NRefactory back to .NET 4.0 (we're not going to port ILSpy to .NET 3.5)

ICSharpCode.NRefactory/CSharp/Ast/TypeMembers/Accessor.cs

@@ -56,11 +56,7 @@ namespace ICSharpCode.NRefactory.CSharp
 			get { return GetChildByRole (Roles.Body); }
 			set { SetChildByRole (Roles.Body, value); }
 		}
-
-		public AstNodeCollection<ParameterDeclaration> Parameters {
-			get { return GetChildrenByRole(Roles.Parameter); }
-		}
-
+		
 		public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
 		{
 			return visitor.VisitAccessor (this, data);

ICSharpCode.NRefactory/ICSharpCode.NRefactory.csproj

@@ -7,7 +7,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>ICSharpCode.NRefactory</RootNamespace>
     <AssemblyName>ICSharpCode.NRefactory</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <ProductVersion>10.0.0</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
@@ -15,7 +15,7 @@
     <NoStdLib>False</NoStdLib>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <NoWarn>1591,0618</NoWarn>
-    <TargetFrameworkProfile />
+    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
     <RunCodeAnalysis>False</RunCodeAnalysis>
     <CodeAnalysisRules>-Microsoft.Design#CA1026;-Microsoft.Security#CA2104</CodeAnalysisRules>
   </PropertyGroup>
@@ -30,14 +30,14 @@
     <OutputPath>bin\Debug\</OutputPath>
     <DebugType>Full</DebugType>
     <Optimize>False</Optimize>
-    <DefineConstants>DEBUG;TRACE;FULL_AST;DOTNET35</DefineConstants>
+    <DefineConstants>DEBUG;TRACE;FULL_AST</DefineConstants>
     <CheckForOverflowUnderflow>False</CheckForOverflowUnderflow>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <OutputPath>bin\Release\</OutputPath>
     <DebugType>None</DebugType>
     <Optimize>True</Optimize>
-    <DefineConstants>TRACE;FULL_AST;DOTNET35</DefineConstants>
+    <DefineConstants>TRACE;FULL_AST</DefineConstants>
     <CheckForOverflowUnderflow>False</CheckForOverflowUnderflow>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">

ICSharpCode.NRefactory/Utils/DotNet35Compat.cs

@@ -16,7 +16,7 @@ internal static class DotNet35Compat
 		#endif
 	}
 	
-	public static IEnumerable<U> SafeCast<T, U>(this IEnumerable<T> elements) where T : U
+	public static IEnumerable<U> SafeCast<T, U>(this IEnumerable<T> elements) where T : class, U where U : class
 	{
 		#if DOTNET35
 		foreach (T item in elements)
@@ -26,7 +26,7 @@ internal static class DotNet35Compat
 		#endif
 	}
 	
-	public static Predicate<U> SafeCast<T, U>(this Predicate<T> predicate) where U : T
+	public static Predicate<U> SafeCast<T, U>(this Predicate<T> predicate) where U : class, T where T : class
 	{
 		#if DOTNET35
 		return e => predicate(e);