diff --git a/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs b/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
index c06c9f4..a256f01 100644
--- a/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
+++ b/src/Blazored.FluentValidation/EditContextFluentValidationExtensions.cs
@@ -76,7 +76,7 @@ private static async Task ValidateField(EditContext editContext,
     {
         var properties = new[] { fieldIdentifier.FieldName };
         var context = new ValidationContext<object>(fieldIdentifier.Model, new PropertyChain(), new MemberNameValidatorSelector(properties));
-            
+
         validator ??= GetValidatorForModel(serviceProvider, fieldIdentifier.Model, disableAssemblyScanning);
 
         if (validator is not null)
@@ -148,7 +148,7 @@ private static FieldIdentifier ToFieldIdentifier(in EditContext editContext, in
 
         var obj = editContext.Model;
         var nextTokenEnd = propertyPath.IndexOfAny(Separators);
-            
+
         // Optimize for a scenario when parsing isn't needed.
         if (nextTokenEnd < 0)
         {
@@ -168,15 +168,15 @@ private static FieldIdentifier ToFieldIdentifier(in EditContext editContext, in
                 // It's an indexer
                 // This code assumes C# conventions (one indexer named Item with one param)
                 nextToken = nextToken.Slice(0, nextToken.Length - 1);
-                var prop = obj.GetType().GetProperty("Item");
+                var prop = obj.GetType().GetProperties().SingleOrDefault(p => p.Name == "Item" && p.CanWrite);
 
                 if (prop is not null)
                 {
                     // we've got an Item property
                     var indexerType = prop.GetIndexParameters()[0].ParameterType;
                     var indexerValue = Convert.ChangeType(nextToken.ToString(), indexerType);
-                        
-                    newObj = prop.GetValue(obj, new [] { indexerValue });
+
+                    newObj = prop.GetValue(obj, new[] { indexerValue });
                 }
                 else
                 {
@@ -211,7 +211,7 @@ private static FieldIdentifier ToFieldIdentifier(in EditContext editContext, in
             }
 
             obj = newObj;
-                
+
             nextTokenEnd = propertyPathAsSpan.IndexOfAny(Separators);
             if (nextTokenEnd < 0)
             {