Many thanks to @sonyps5201314 for providing the test cases and a suggested fix, which inspired these changes.

Various improvements regarding primary constructor decompilation, including:
- introduce `HasPrimaryConstructor` property in the AST, as there is a difference between no primary constructor and a parameterless primary constructor
- improved support for inherited records and forwarded ctor calls
- exclude non-public fields and properties in IsPrintedMember
- introduce an option to always make the decompiler emit primary constructors, when possible

Author: siegfriedpammer

ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj

@@ -163,6 +163,8 @@
     <Compile Include="TestCases\Pretty\Issue3571_B.cs" />
     <Compile Include="TestCases\Pretty\Issue3571_A.cs" />
     <Compile Include="TestCases\Pretty\Issue3576.cs" />
+    <Compile Include="TestCases\Pretty\PlaystationPreferPrimary.cs" />
+    <Compile Include="TestCases\Pretty\Playstation.cs" />
     <None Include="TestCases\Ugly\NoLocalFunctions.Expected.cs" />
     <None Include="TestCases\ILPretty\Issue3504.cs" />
     <Compile Include="TestCases\ILPretty\MonoFixed.cs" />

ICSharpCode.Decompiler.Tests/PrettyTestRunner.cs

@@ -535,6 +535,22 @@ public async Task Records([ValueSource(nameof(roslyn3OrNewerOptions))] CompilerO
 			await RunForLibrary(cscOptions: cscOptions | CompilerOptions.NullableEnable);
 		}
 
+		[Test]
+		public async Task Playstation([ValueSource(nameof(roslyn4OrNewerOptions))] CompilerOptions cscOptions)
+		{
+			// see https://github.com/icsharpcode/ILSpy/pull/3598#issuecomment-3465151525
+			await RunForLibrary(cscOptions: cscOptions | CompilerOptions.NullableEnable);
+		}
+
+		[Test]
+		public async Task PlaystationPreferPrimary([ValueSource(nameof(roslyn4OrNewerOptions))] CompilerOptions cscOptions)
+		{
+			// see https://github.com/icsharpcode/ILSpy/pull/3598#issuecomment-3465151525
+			await RunForLibrary(cscOptions: cscOptions | CompilerOptions.NullableEnable, configureDecompiler: settings => {
+				settings.PreferPrimaryConstructorIfPossible = true;
+			});
+		}
+
 		[Test]
 		public async Task ExtensionProperties([ValueSource(nameof(roslyn4OrNewerOptions))] CompilerOptions cscOptions)
 		{

ICSharpCode.Decompiler.Tests/TestCases/Pretty/ConstructorInitializers.cs

@@ -127,6 +127,18 @@ public void Print()
 			}
 		}
 
+
+
+		public class ClassWithPrimaryCtorUsingGlobalParameterInExpressionAssignedToProperty(int a)
+		{
+			public int A { get; set; } = (int)Math.Abs(Math.PI * (double)a);
+
+			public void Print()
+			{
+				Console.WriteLine(A);
+			}
+		}
+
 		public class ClassWithPrimaryCtorUsingGlobalParameterAssignedToEvent(EventHandler a)
 		{
 			public event EventHandler A = a;