如何编写按前缀访问所有字段的ModelBinder？

public class PrefixModelBinder : IModelBinder
{
    public Task BindModelAsync(ModelBindingContext bindingContext)
    {
        var modelType = bindingContext.ModelType;
        var formFields = bindingContext.HttpContext.Request.Form;

        var prefix = "prefix"; // 指定的前缀
        var prefixedFields = formFields.Where(f => f.Key.StartsWith(prefix));

        var model = Activator.CreateInstance(modelType);
        var modelProperties = modelType.GetProperties();

        foreach (var field in prefixedFields)
        {
            var fieldName = field.Key.Substring(prefix.Length);
            var property = modelProperties.FirstOrDefault(p => p.Name.Equals(fieldName, StringComparison.OrdinalIgnoreCase));

            if (property != null)
            {
                var value = field.Value.ToString();
                var setter = property.SetMethod;

                setter.Invoke(model, new object[] { Convert.ChangeType(value, property.PropertyType) });
            }
        }

        bindingContext.Result = ModelBindingResult.Success(model);
        return Task.CompletedTask;
    }
}