diff --git a/src/YouTrackSharp/Issues/Field.cs b/src/YouTrackSharp/Issues/Field.cs
index b2c4de87..1215cbe2 100644
--- a/src/YouTrackSharp/Issues/Field.cs
+++ b/src/YouTrackSharp/Issues/Field.cs
@@ -50,6 +50,8 @@ public string AsString()
                     return null;
                 case ICollection<string> collection:
                     return collection.SingleOrDefault();
+                case ICollection<Assignee> collection:
+                    return collection.SingleOrDefault().FullName;
             }
 
             return Value.ToString();
diff --git a/src/YouTrackSharp/Issues/Issue.cs b/src/YouTrackSharp/Issues/Issue.cs
index 8ca4008e..6f3bb29b 100644
--- a/src/YouTrackSharp/Issues/Issue.cs
+++ b/src/YouTrackSharp/Issues/Issue.cs
@@ -90,6 +90,11 @@ public bool IsMarkdown {
         /// </summary>
         public ICollection<Field> Fields => _fields.Values;
 
+        /// <summary>
+        /// Get all field names
+        /// </summary>
+        public ICollection<string> FieldNames => _fields.Keys;
+
         /// <summary>
         /// Issue comments.
         /// </summary>
@@ -158,7 +163,10 @@ public override bool TrySetMember(SetMemberBinder binder, object value)
                     if (fieldElement.Value is JArray fieldElementAsArray)
                     {
                         // Map collection
-                        if (string.Equals(fieldElement.Name, "assignee", StringComparison.OrdinalIgnoreCase))
+                        // Heuristics for finding fields of the type List<Assignee>
+                        var children = new List<JToken>(fieldElementAsArray.First.Children());
+                        if (children.Count == 2 && children[0] is JProperty && ((JProperty)children[0]).Name == "value"
+                            && children[1] is JProperty && ((JProperty)children[1]).Name == "fullName")
                         {
                             // For assignees, we can do a strong-typed list.
                             fieldElement.Value = fieldElementAsArray.ToObject<List<Assignee>>();