Provide a way for options to be set on the workspace.

***NO_CI***
 (changeset 1275257)

Src/Workspaces/Core/Formatting/Formatter.cs

@@ -286,7 +286,7 @@ internal static SyntaxNode Format(SyntaxNode node, IEnumerable<TextSpan> spans,
             var languageFormatter = workspace.Services.GetLanguageServices(node.Language).GetService<ISyntaxFormattingService>();
             if (languageFormatter != null)
             {
-                options = options ?? workspace.GetOptions();
+                options = options ?? workspace.Options;
                 rules = rules ?? GetDefaultFormattingRules(workspace, node.Language);
                 return languageFormatter.Format(node, spans, options, rules, cancellationToken).GetFormattedRoot(cancellationToken);
             }
@@ -321,7 +321,7 @@ internal static IList<TextChange> GetFormattedTextChanges(SyntaxNode node, IEnum
             var languageFormatter = workspace.Services.GetLanguageServices(node.Language).GetService<ISyntaxFormattingService>();
             if (languageFormatter != null)
             {
-                options = options ?? workspace.GetOptions();
+                options = options ?? workspace.Options;
                 rules = rules ?? GetDefaultFormattingRules(workspace, node.Language);
                 return languageFormatter.Format(node, spans, options, rules, cancellationToken).GetTextChanges(cancellationToken);
             }

Src/Workspaces/Core/Recommendations/Recommender.cs

@@ -17,7 +17,7 @@ public static class Recommender
             OptionSet options = null,
             CancellationToken cancellationToken = default(CancellationToken))
         {
-            options = options ?? workspace.GetOptions();
+            options = options ?? workspace.Options;
             var languageRecommender = workspace.Services.GetLanguageServices(semanticModel.Language).GetService<IRecommendationService>();
 
             return languageRecommender.GetRecommendedSymbolsAtPosition(workspace, semanticModel, position, options, cancellationToken);

Src/Workspaces/Core/Rename/ConflictEngine/RenamedSpansTracker.cs

@@ -195,7 +195,7 @@ internal async Task<Solution> SimplifyAsync(Solution solution, IEnumerable<Docum
 
                     if (replacementTextValid)
                     {
-                        var optionSet = solution.Workspace.GetOptions();
+                        var optionSet = solution.Workspace.Options;
                         document = await Simplifier.ReduceAsync(document, Simplifier.Annotation, optionSet, cancellationToken).ConfigureAwait(false);
                         document = await Formatter.FormatAsync(document, Formatter.Annotation, cancellationToken: cancellationToken).ConfigureAwait(false);
                     }

Src/Workspaces/Core/Simplification/AbstractSimplificationService.cs

@@ -45,7 +45,7 @@ public async Task<Document> ReduceAsync(Document document, IEnumerable<TextSpan>
                     return document;
                 }
 
-                optionSet = optionSet ?? document.Project.Solution.Workspace.GetOptions();
+                optionSet = optionSet ?? document.Project.Solution.Workspace.Options;
 
                 var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
 

Src/Workspaces/Core/Workspace/Workspace.cs

@@ -153,11 +153,19 @@ protected Solution SetCurrentSolution(Solution solution)
         }
 
         /// <summary>
-        /// Get's the set of all global options.
+        /// Gets or sets the set of all global options.
         /// </summary>
-        public OptionSet GetOptions()
+        public OptionSet Options
         {
-            return this.services.GetService<IOptionService>().GetOptions();
+            get
+            {
+                return this.services.GetService<IOptionService>().GetOptions();
+            }
+
+            set
+            {
+                this.services.GetService<IOptionService>().SetOptions(value);
+            }
         }
 
         /// <summary>

Src/Workspaces/CoreTest/Formatting/FormattingTestBase.cs

@@ -43,7 +43,7 @@ public abstract class FormattingTestBase
 
                 var syntaxTree = document.GetSyntaxTreeAsync().Result;
 
-                var options = workspace.GetOptions();
+                var options = workspace.Options;
                 if (changedOptionSet != null)
                 {
                     foreach (var entry in changedOptionSet)