Do not generate property if field name consists of " _"

Author: BelousovSer

DevExpress.Mvvm.CodeGenerators.Tests/TestSource/GenerationTests.cs

@@ -175,6 +175,20 @@ partial class Example {
             StringAssert.Contains("OnParentViewModelChanged", generatedWithOnChanged);
             StringAssert.DoesNotContain("OnParentViewModelChanged", generatedWithOutOnChanged);
         }
+        [Test]
+        public void GeneratePropertyName_() {
+            var source = @"using DevExpress.Mvvm.CodeGenerators;
+
+namespace Test {
+    [GenerateViewModel]
+    partial class Example {
+        [GenerateProperty]
+        int _;
+    }
+}
+";
+            Assert.DoesNotThrow(() => GenerateCode(source));
+        }
 
         static string GenerateCode(string source, bool addMVVM = true) {
             var references = new[] {
@@ -235,6 +249,9 @@ void OnDateTimeChanging() { }
         [GenerateProperty(IsVirtual = true, SetterAccessModifier = AccessModifier.Protected)]
         double _Double;
 
+        [GenerateProperty]
+        int _;
+
         /// <summary>
         /// Test command comment
         /// </summary>

DevExpress.Mvvm.CodeGenerators/ExtensionMethods.cs

@@ -20,7 +20,7 @@ static NullableFlowState ToNullableFlowState(NullableAnnotation nullableAnnotati
 
         #region String
         public static string ConcatToString(this IEnumerable<string> source, string separator) => string.Join(separator, source);
-        public static string FirstToUpperCase(this string str) => $"{str.Substring(0, 1).ToUpper()}{str.Substring(1)}";
+        public static string FirstToUpperCase(this string str) => string.IsNullOrEmpty(str) ? str : $"{str.Substring(0, 1).ToUpper()}{str.Substring(1)}";
         #endregion
         public static string TypeToString(this TypeKind type) => type == TypeKind.Structure ? "struct" : type.ToString().ToLower();
 

DevExpress.Mvvm.CodeGenerators/Generators/PropertyGenerator.cs

@@ -10,15 +10,15 @@ static class PropertyGenerator {
             if(propertyName == fieldSymbol.Name)
                 info.Context.ReportInvalidPropertyName(fieldSymbol, propertyName);
 
-            CSharpSyntaxNode fieldSyntaxNode = (CSharpSyntaxNode)fieldSymbol.DeclaringSyntaxReferences[0].GetSyntax().Parent?.Parent!;
-            XMLCommentHelper.AppendComment(source, fieldSyntaxNode);
-
             string? changedMethod = PropertyHelper.GetChangedMethod(info, classSymbol, fieldSymbol, propertyName, fieldSymbol.Type);
             string? changingMethod = PropertyHelper.GetChangingMethod(info, classSymbol, fieldSymbol, propertyName, fieldSymbol.Type);
 
-            if(propertyName == fieldSymbol.Name || changedMethod == null || changingMethod == null)
+            if(propertyName == fieldSymbol.Name || string.IsNullOrEmpty(propertyName) || changedMethod == null || changingMethod == null)
                 return null;
 
+            CSharpSyntaxNode fieldSyntaxNode = (CSharpSyntaxNode)fieldSymbol.DeclaringSyntaxReferences[0].GetSyntax().Parent?.Parent!;
+            XMLCommentHelper.AppendComment(source, fieldSyntaxNode);
+
             PropertyHelper.AppendAttributesList(source, fieldSymbol);
 
             bool isVirtual = PropertyHelper.GetIsVirtualValue(fieldSymbol, info.PropertyAttributeSymbol);