Removed unnecessary if statement in generated code

Author: Sergio0694

Microsoft.Toolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.cs

@@ -171,21 +171,29 @@ private static PropertyDeclarationSyntax CreatePropertyDeclaration(GeneratorExec
             {
                 // Generate the inner setter block as follows:
                 //
+                // SetProperty(ref <FIELD_NAME>, value, true);
+                //
+                // Or in case there is at least one dependent property:
+                //
                 // if (SetProperty(ref <FIELD_NAME>, value, true))
                 // {
                 //     OnPropertyChanged("Property1"); // Optional
                 //     OnPropertyChanged("Property2");
                 //     ...
                 //     OnPropertyChanged("PropertyN");
                 // }
-                setterBlock = Block(
-                    IfStatement(
-                        InvocationExpression(IdentifierName("SetProperty"))
-                        .AddArgumentListArguments(
-                            Argument(IdentifierName(fieldSymbol.Name)).WithRefOrOutKeyword(Token(SyntaxKind.RefKeyword)),
-                            Argument(IdentifierName("value")),
-                            Argument(LiteralExpression(SyntaxKind.TrueLiteralExpression))),
-                        Block(dependentPropertyNotificationStatements)));
+                InvocationExpressionSyntax setPropertyExpression =
+                    InvocationExpression(IdentifierName("SetProperty"))
+                    .AddArgumentListArguments(
+                        Argument(IdentifierName(fieldSymbol.Name)).WithRefOrOutKeyword(Token(SyntaxKind.RefKeyword)),
+                        Argument(IdentifierName("value")),
+                        Argument(LiteralExpression(SyntaxKind.TrueLiteralExpression)));
+
+                setterBlock = dependentPropertyNotificationStatements.Count switch
+                {
+                    0 => Block(ExpressionStatement(setPropertyExpression)),
+                    _ => Block(IfStatement(setPropertyExpression, Block(dependentPropertyNotificationStatements)))
+                };
             }
             else
             {