Simplify null checks

src/VisualStudio/Core/Impl/CodeModel/CodeModelProjectCache.cs

@@ -78,9 +78,7 @@ internal CodeModelProjectCache(IThreadingContext threadingContext, ProjectId pro
         {
             var cacheEntry = GetCacheEntry(filePath);
 
-            return cacheEntry != null
-                ? cacheEntry.Value.ComHandle
-                : null;
+            return cacheEntry?.ComHandle;
         }
 
         public ComHandle<EnvDTE80.FileCodeModel2, FileCodeModel> GetOrCreateFileCodeModel(string filePath, object parent)

src/VisualStudio/Core/Impl/CodeModel/FileCodeModel.cs

@@ -588,9 +588,7 @@ internal EnvDTE.CodeElement CodeElementFromPosition(int position, EnvDTE.vsCMEle
                 }
             }
 
-            var node = parent != null
-                ? parent.AncestorsAndSelf().FirstOrDefault(n => CodeModelService.MatchesScope(n, scope))
-                : null;
+            var node = parent?.AncestorsAndSelf().FirstOrDefault(n => CodeModelService.MatchesScope(n, scope));
 
             if (node == null)
             {

src/VisualStudio/Core/Impl/CodeModel/InternalElements/CodeAttribute.cs

@@ -74,15 +74,7 @@ public override EnvDTE.vsCMElement Kind
             get { return EnvDTE.vsCMElement.vsCMElementAttribute; }
         }
 
-        public override object Parent
-        {
-            get
-            {
-                return _parent != null
-                    ? _parent
-                    : (object)this.FileCodeModel;
-            }
-        }
+        public override object Parent => _parent ?? (object)this.FileCodeModel;
 
         public EnvDTE.CodeElements Arguments
         {