Minor changes.

Author: ChebanovDD

src/UnityUxmlGenerator.UnityPackage/Assets/Plugins/UnityUxmlGenerator/Runtime/UnityUxmlGenerator.dll

@@ -4,9 +4,9 @@ namespace UnityUxmlGenerator.Extensions;
 
 internal static class StringExtensions
 {
-    public static string ToFieldName(this string propertyName)
+    public static string ToPrivateFieldName(this string propertyName)
     {
-        return string.Concat(char.ToLower(propertyName[0]), propertyName.Substring(1));
+        return string.Concat("_", char.ToLower(propertyName[0]), propertyName.Substring(1));
     }
 
     public static string ToDashCase(this string propertyName)

src/UnityUxmlGenerator/Extensions/StringExtensions.cs

@@ -65,7 +65,7 @@ private static string GetUxmlTraitsFields(List<(string, string?)> properties)
         foreach (var (propertyName, uxmlAttributeDefaultValue) in properties)
         {
             var attributeUxmlName = propertyName.ToDashCase();
-            var attributeFieldName = propertyName.ToFieldName();
+            var attributeFieldName = propertyName.ToPrivateFieldName();
             var attributeDefaultValue = uxmlAttributeDefaultValue ?? string.Empty;
 
             stringBuilder.AppendLine($"\t\t\t{GeneratedCodeAttribute}");
@@ -86,7 +86,7 @@ private static string GetUxmlTraitsInitialization(string elementClassName,
 
         foreach (var (propertyName, _) in properties)
         {
-            var attributeFieldName = propertyName.ToFieldName();
+            var attributeFieldName = propertyName.ToPrivateFieldName();
 
             stringBuilder.AppendLine(
                 $"\t\t\t\tcontrol.{propertyName} = {attributeFieldName}.GetValueFromBag(bag, context);");

src/UnityUxmlGenerator/UxmlGenerator.Traits.cs

@@ -4,6 +4,8 @@
 
 namespace UnityUxmlGenerator;
 
+// TODO: Use a syntax tree API to generate source code.
+
 [Generator]
 internal sealed partial class UxmlGenerator : ISourceGenerator
 {