Nsryjdtyk

I have an android app I'm working on in Visual Studio Xamarin. I have some data in Firebase (see image) which I want to download. The error message says

Newtonsoft.Json.JsonSerializationException: Error converting value "TempRecords" to type 'System.Collections.Generic.Dictionary2[System.String,Database3.TempClass]'. Path '', line 1, position 13. ---> System.ArgumentException: Could not cast or convert from System.String to System.Collections.Generic.Dictionary2[System.String,Database3.TempClass].
at Newtonsoft.Json.Utilities.ConvertUtils.EnsureTypeAssignable (System.Object value, System.Type initialType, System.Type targetType) [0x00067] in :0
at Newtonsoft.Json.Utilities.ConvertUtils.ConvertOrCast (System.Object initialValue, System.Globalization.CultureInfo culture, System.Type targetType) [0x00036] in :0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x000bf] in :0
--- End of inner exception stack trace ---

The line of code it fails on is

var tempRecords = await AppData_Droid.dataNode.Child("TempRecords").Child("Address").OnceAsync<TempClass>();

The TempClass is

namespace Database3

{
public class TempClass
{
public string Address { get; internal set; }
public string Name { get; internal set; }
}
}

and all other resources etc are in place and working - I can create new records in Firebase, just can't download them.
The image shows a test record.
Thanks for your help.