More modern defaults

Constants.cs

@@ -0,0 +1,49 @@
+namespace DecompilationDiffer;
+
+public static class Constants
+{
+    public const string InitialCode = """
+        using System.Collections.Generic;
+        using System.Linq;
+
+        class C
+        {
+            private IEnumerable<int> _data = M(new [] {1, 2, 3});
+
+            static IEnumerable<int> M(IEnumerable<int> input)
+            {
+                return input.Select(x => x);
+            }
+        }
+        """;
+
+    public const string Version1Code = """
+        using System.Collections.Generic;
+        using System.Linq;
+
+        class C
+        {
+            private IEnumerable<int> _data = M([1, 2, 3]);
+
+            static IEnumerable<int> M(IEnumerable<int> input)
+            {
+                return input.Select(x => x);
+            }
+        }
+        """;
+
+    public const string Version2Code = """
+        using System.Collections.Generic;
+        using System.Linq;
+
+        class C
+        {
+            private IEnumerable<int> _data = M(1, 2, 3);
+
+            static IEnumerable<int> M(params IEnumerable<int> input)
+            {
+                return input.Select(x => x);
+            }
+        }
+        """;
+}

Pages/Index.razor

@@ -41,9 +41,9 @@
     private StandaloneDiffEditor v2Diff = null!;
     private bool _autoRefresh = true;
     private bool _syncScroll = true;
-    private string _initialBaseCode = "record R(int X);";
-    private string _initialVersion1Code = "record R(int X)\n{\n    public int X { get; init; }\n}";
-    private string _initialVersion2Code = "record R(int X)\n{\n    public int X { get; set; } = X;\n}";
+    private string _initialBaseCode = Constants.InitialCode;
+    private string _initialVersion1Code = Constants.Version1Code;
+    private string _initialVersion2Code = Constants.Version2Code;
 
     [ParameterAttribute]
     public string? fragment { get; set; }