#912: add setting for turning off implicit method group conversions

ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs

@@ -69,7 +69,7 @@ namespace ICSharpCode.Decompiler.CSharp
 		internal readonly ICompilation compilation;
 		internal readonly CSharpResolver resolver;
 		readonly TypeSystemAstBuilder astBuilder;
-		readonly DecompilerSettings settings;
+		internal readonly DecompilerSettings settings;
 		readonly CancellationToken cancellationToken;
 		
 		public ExpressionBuilder(IDecompilerTypeSystem typeSystem, ITypeResolveContext decompilationContext, DecompilerSettings settings, CancellationToken cancellationToken)

ICSharpCode.Decompiler/CSharp/TranslatedExpression.cs

@@ -179,7 +179,9 @@ namespace ICSharpCode.Decompiler.CSharp
 						|| type.Kind == TypeKind.Delegate && conversion.Conversion.IsAnonymousFunctionConversion
 						)) {
 						return this.UnwrapChild(cast.Expression);
-					} else if (Expression is ObjectCreateExpression oce && conversion.Conversion.IsMethodGroupConversion && oce.Arguments.Count == 1) {
+					} else if (Expression is ObjectCreateExpression oce && conversion.Conversion.IsMethodGroupConversion
+							&& oce.Arguments.Count == 1 && expressionBuilder.settings.UseImplicitMethodGroupConversion)
+					{
 						return this.UnwrapChild(oce.Arguments.Single());
 					}
 				}

ICSharpCode.Decompiler/DecompilerSettings.cs

@@ -229,6 +229,23 @@ namespace ICSharpCode.Decompiler
 			}
 		}
 
+		bool useImplicitMethodGroupConversion = true;
+
+		/// <summary>
+		/// Gets/Sets whether to use C# 2.0 method group conversions.
+		/// true: <c>EventHandler h = this.OnClick;</c>
+		/// false: <c>EventHandler h = new EventHandler(this.OnClick);</c>
+		/// </summary>
+		public bool UseImplicitMethodGroupConversion {
+			get { return useImplicitMethodGroupConversion; }
+			set {
+				if (useImplicitMethodGroupConversion != value) {
+					useImplicitMethodGroupConversion = value;
+					OnPropertyChanged();
+				}
+			}
+		}
+
 		bool fullyQualifyAmbiguousTypeNames = true;
 		
 		public bool FullyQualifyAmbiguousTypeNames {