diff --git a/README.md b/README.md
index 02b1e46..2a95284 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ If you're using async validation, you can use the `ValidateAsync` method on the
 
     private async void SubmitFormAsync()
     {
-		if (await _fluentValidationValidator!.ValidateAsync())
+        if (await _fluentValidationValidator!.ValidateAsync())
         {
             Console.WriteLine("Form Submitted Successfully!");
         }
diff --git a/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs b/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
index f9855ce..f879a7a 100644
--- a/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
+++ b/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
@@ -227,6 +227,16 @@ private static FieldIdentifier ToFieldIdentifier(in EditContext editContext, in
                         var indexerValue = int.Parse(nextToken);
                         newObj = array[indexerValue];
                     }
+                    else if (obj is IReadOnlyList<object> readOnlyList)
+                    {
+                        // Addresses an issue with collection expressions in C# 12 regarding IReadOnlyList:
+                        // Generates a <>z__ReadOnlyArray which:
+                        // - lacks an Item property, and
+                        // - cannot be cast to object[] successfully.
+                        // This workaround accesses elements directly using an indexer.
+                        var indexerValue = int.Parse(nextToken);
+                        newObj = readOnlyList[indexerValue];
+                    }
                     else
                     {
                         throw new InvalidOperationException($"Could not find indexer on object of type {obj.GetType().FullName}.");