Use a UI to control whether to use the `struct field initializer` syntax sugar.

ICSharpCode.Decompiler.Tests/RoundtripAssembly.cs

@@ -70,7 +70,7 @@ namespace ICSharpCode.Decompiler.Roundtrip
 		[Test]
 		public async Task NRefactory_CSharp()
 		{
-			await RunWithTest("NRefactory", "ICSharpCode.NRefactory.CSharp.dll", "ICSharpCode.NRefactory.Tests.dll", LanguageVersion.CSharp10_0);
+			await RunWithTest("NRefactory", "ICSharpCode.NRefactory.CSharp.dll", "ICSharpCode.NRefactory.Tests.dll");
 		}
 
 		[Test]

ICSharpCode.Decompiler/CSharp/Transforms/TransformFieldAndConstructorInitializers.cs

@@ -205,6 +205,11 @@ namespace ICSharpCode.Decompiler.CSharp.Transforms
 				if (ctorMethodDef != null && declaringTypeDefinition?.IsReferenceType == false && !declaringTypeDefinition.IsRecord && !isStruct)
 					return;
 
+				if (isStruct && !context.Settings.StructFieldInitializers)
+				{
+					return;
+				}
+
 				bool ctorIsUnsafe = instanceCtorsNotChainingWithThis.All(c => c.HasModifier(Modifiers.Unsafe));
 
 				if (!context.DecompileRun.RecordDecompilers.TryGetValue(declaringTypeDefinition, out var record))

ICSharpCode.Decompiler/DecompilerSettings.cs

@@ -150,6 +150,7 @@ namespace ICSharpCode.Decompiler
 			if (languageVersion < CSharp.LanguageVersion.CSharp10_0)
 			{
 				fileScopedNamespaces = false;
+				structFieldInitializers = false;
 				recordStructs = false;
 			}
 			if (languageVersion < CSharp.LanguageVersion.CSharp11_0)
@@ -187,7 +188,7 @@ namespace ICSharpCode.Decompiler
 				return CSharp.LanguageVersion.CSharp12_0;
 			if (scopedRef || requiredMembers || numericIntPtr || utf8StringLiterals || unsignedRightShift || checkedOperators)
 				return CSharp.LanguageVersion.CSharp11_0;
-			if (fileScopedNamespaces || recordStructs)
+			if (fileScopedNamespaces || structFieldInitializers || recordStructs)
 				return CSharp.LanguageVersion.CSharp10_0;
 			if (nativeIntegers || initAccessors || functionPointers || forEachWithGetEnumeratorExtension
 				|| recordClasses || withExpressions || usePrimaryConstructorSyntax || covariantReturns
@@ -464,6 +465,24 @@ namespace ICSharpCode.Decompiler
 			}
 		}
 
+		bool structFieldInitializers = true;
+
+		/// <summary>
+		/// Gets/Sets whether C# 10 struct field initializers should be used.
+		/// </summary>
+		[Category("C# 10.0 / VS 2022")]
+		[Description("DecompilerSettings.UseStructFieldInitializerSyntax")]
+		public bool StructFieldInitializers {
+			get { return structFieldInitializers; }
+			set {
+				if (structFieldInitializers != value)
+				{
+					structFieldInitializers = value;
+					OnPropertyChanged();
+				}
+			}
+		}
+
 		bool anonymousMethods = true;
 
 		/// <summary>

ILSpy/Properties/Resources.Designer.cs

@@ -1632,6 +1632,15 @@ namespace ICSharpCode.ILSpy.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Use struct field initializer syntax.
+        /// </summary>
+        public static string DecompilerSettings_UseStructFieldInitializerSyntax {
+            get {
+                return ResourceManager.GetString("DecompilerSettings.UseStructFieldInitializerSyntax", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Use throw expressions.
         /// </summary>

ILSpy/Properties/Resources.resx

@@ -564,6 +564,9 @@ Are you sure you want to continue?</value>
   <data name="DecompilerSettings.UseStringInterpolation" xml:space="preserve">
     <value>Use string interpolation</value>
   </data>
+  <data name="DecompilerSettings.UseStructFieldInitializerSyntax" xml:space="preserve">
+    <value>Use struct field initializer syntax</value>
+  </data>
   <data name="DecompilerSettings.UseThrowExpressions" xml:space="preserve">
     <value>Use throw expressions</value>
   </data>

ILSpy/Properties/Resources.zh-Hans.resx

@@ -522,6 +522,9 @@
   <data name="DecompilerSettings.UseStringInterpolation" xml:space="preserve">
     <value>使用字符串内插</value>
   </data>
+  <data name="DecompilerSettings.UseStructFieldInitializerSyntax" xml:space="preserve">
+    <value>使用结构字段初始化器语法</value>
+  </data>
   <data name="DecompilerSettings.UseThrowExpressions" xml:space="preserve">
     <value>使用 throw 表达式</value>
   </data>