Use compound assignment

src/EditorFeatures/Core/Implementation/IntelliSense/Completion/Model.cs

@@ -266,7 +266,7 @@ internal SnapshotSpan GetCurrentSpanInSnapshot(ViewTextSpan originalSpan, ITextS
             var currentSpan = GetCurrentSpanInSnapshot(originalSpan, textSnapshot);
 
             var startPosition = currentSpan.Start;
-            var endPosition = endPoint.HasValue ? endPoint.Value : currentSpan.End;
+            var endPosition = endPoint ?? currentSpan.End;
 
             // TODO(cyrusn): What to do if the span is empty, or the end comes before the start.
             // Can that even happen?  Not sure, so we'll just be resilient just in case.

src/VisualStudio/Core/Def/Implementation/Venus/ContainedDocument.cs

@@ -589,7 +589,7 @@ private IHierarchicalDifferenceCollection DiffStrings(string leftTextWithReplace
             var diffService = _differenceSelectorService.GetTextDifferencingService(
                 _workspace.Services.GetLanguageServices(_project.Language).GetService<IContentTypeLanguageService>().GetDefaultContentType());
 
-            diffService = diffService ?? _differenceSelectorService.DefaultTextDifferencingService;
+            diffService ??= _differenceSelectorService.DefaultTextDifferencingService;
             return diffService.DiffStrings(leftTextWithReplacement, rightTextWithReplacement, s_venusEditOptions.DifferenceOptions);
         }
 

src/Workspaces/Remote/ServiceHub/Shared/Extensions.cs

@@ -23,7 +23,7 @@ internal static partial class Extensions
             TraceSource logger,
             IEnumerable<JsonConverter> jsonConverters = null)
         {
-            jsonConverters = jsonConverters ?? SpecializedCollections.EmptyEnumerable<JsonConverter>();
+            jsonConverters ??= SpecializedCollections.EmptyEnumerable<JsonConverter>();
 
             var jsonFormatter = new JsonMessageFormatter();
             jsonFormatter.JsonSerializer.Converters.AddRange(jsonConverters.Concat(AggregateJsonConverter.Instance));