More efficient/correct test for static class icon

ILSpy/TreeNodes/TypeTreeNode.cs

@@ -42,28 +42,35 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			this.LazyLoading = true;
 		}
 
-		public TypeDefinition TypeDefinition {
+		public TypeDefinition TypeDefinition
+		{
 			get { return type; }
 		}
 
-		public AssemblyTreeNode ParentAssemblyNode {
+		public AssemblyTreeNode ParentAssemblyNode
+		{
 			get { return parentAssemblyNode; }
 		}
 
-		public string Name {
+		public string Name
+		{
 			get { return type.Name; }
 		}
 
-		public string Namespace {
+		public string Namespace
+		{
 			get { return type.Namespace; }
 		}
 
-		public override object Text {
+		public override object Text
+		{
 			get { return HighlightSearchMatch(this.Language.TypeToString(type, includeNamespace: false)); }
 		}
 
-		public bool IsPublicAPI {
+		public bool IsPublicAPI
-			get {
+		{
+			get
+			{
 				switch (type.Attributes & TypeAttributes.VisibilityMask) {
 					case TypeAttributes.Public:
 					case TypeAttributes.NestedPublic:
@@ -188,15 +195,20 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 		private static bool IsStaticClass(TypeDefinition type)
 		{
-			if(type.IsSealed)
+			if (type.IsSealed) {
+				if (type.IsAbstract)
+					return true;
+				else
 					return !type.Methods.Where(m => m.Name == ".ctor").Any(m => !m.IsPrivate);
+			}
 
 			return false;
 		}
 
 		#endregion
 
-		MemberReference IMemberTreeNode.Member {
+		MemberReference IMemberTreeNode.Member
+		{
 			get { return type; }
 		}
 	}