Resolved issue of ObjStore GetInfo MTime returning 0 (#567)

* Fixed version number sent to server and changed lang to .NET from C#. Same as V1 client.

* default version to 1.0.0

* changed default version to 2.0.0

* Use informational version attribute and cut down to get additional info such as -preview. Also changed name to .Net to .NET for the client name.

* Add filtering to KV method returning all keys

* Ignore KV keys filtering in Pre 2.10 tests

* Resolved issue of ObjStore GetInfo MTime returning 0

* Changed public StoredMessage.Time datatype to DateTimeOffset from string.

src/NATS.Client.JetStream/Models/StoredMessage.cs

@@ -38,10 +38,10 @@ public record StoredMessage
     [System.Text.Json.Serialization.JsonIgnore(Condition = System.Text.Json.Serialization.JsonIgnoreCondition.Never)]
     [System.ComponentModel.DataAnnotations.Required(AllowEmptyStrings = true)]
 #if NET6_0
-    public string Time { get; set; } = default!;
+    public DateTimeOffset Time { get; set; } = default!;
 #else
 #pragma warning disable SA1206
-    public required string Time { get; set; }
+    public required DateTimeOffset Time { get; set; }
 #pragma warning restore SA1206
 #endif
 

src/NATS.Client.KeyValueStore/NatsKVStore.cs

@@ -256,9 +256,6 @@ public async ValueTask<NatsKVEntry<T>> GetEntryAsync<T>(string key, ulong revisi
                 }
             }
 
-            if (!DateTimeOffset.TryParse(response.Message.Time, out var created))
-                throw new NatsKVException("Can't parse timestamp message value");
-
             T? data;
             NatsDeserializeException? deserializeException = null;
             if (response.Message.Data.Length > 0)
@@ -282,7 +279,7 @@ public async ValueTask<NatsKVEntry<T>> GetEntryAsync<T>(string key, ulong revisi
 
             return new NatsKVEntry<T>(Bucket, key)
             {
-                Created = created,
+                Created = response.Message.Time,
                 Revision = response.Message.Seq,
                 Value = data,
                 UsedDirectGet = false,

src/NATS.Client.ObjectStore/NatsObjStore.cs

@@ -542,6 +542,8 @@ public async ValueTask<ObjectMetadata> GetInfoAsync(string key, bool showDeleted
             var buffer = new ReadOnlySequence<byte>(response.Message.Data);
             var data = NatsObjJsonSerializer<ObjectMetadata>.Default.Deserialize(buffer) ?? throw new NatsObjException("Can't deserialize object metadata");
 
+            data.MTime = response.Message.Time;
+
             if (!showDeleted && data.Deleted)
             {
                 throw new NatsObjNotFoundException($"Object not found: {key}");