fix: handle Object[] in .NET array deserialization

Fixed an issue where array deserialization in Model.cs.twig failed when
System.Text.Json creates Object[] instead of List<T>. Added a new ToList<T>
extension method that properly handles JsonElement, Object[], List<T>, and
IEnumerable<T> types, ensuring robust array deserialization across all scenarios.

Author: ChiragAgg5k

templates/dotnet/Package/Extensions/Extensions.cs.twig

@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text.Json;
 
 namespace {{ spec.title | caseUcfirst }}.Extensions
@@ -12,6 +13,18 @@ namespace {{ spec.title | caseUcfirst }}.Extensions
             return JsonSerializer.Serialize(dict, Client.SerializerOptions);
         }
 
+        public static List<T> ToList<T>(object value)
+        {
+            return value switch
+            {
+                JsonElement jsonElement => jsonElement.Deserialize<List<T>>()!,
+                object[] objArray => objArray.Cast<T>().ToList(),
+                List<T> list => list,
+                IEnumerable<T> enumerable => enumerable.ToList(),
+                _ => throw new InvalidCastException($"Cannot convert {value.GetType()} to List<{typeof(T)}>")
+            };
+        }
+
         public static string ToQueryString(this Dictionary<string, object?> parameters)
         {
             var query = new List<string>();

templates/dotnet/Package/Models/Model.cs.twig

@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using {{ spec.title | caseUcfirst }}.Enums;
+using {{ spec.title | caseUcfirst }}.Extensions;
 
 namespace {{ spec.title | caseUcfirst }}.Models
 {
@@ -41,7 +42,7 @@ namespace {{ spec.title | caseUcfirst }}.Models
             {{ property.name | caseCamel | escapeKeyword | removeDollarSign }}:{{' '}}
                 {%- if property.sub_schema %}
                     {%- if property.type == 'array' -%}
-                        map["{{ property.name }}"] is JsonElement jsonArray{{ loop.index }} ? jsonArray{{ loop.index }}.Deserialize<List<Dictionary<string, object>>>()!.Select(it => {{ property.sub_schema | caseUcfirst | overrideIdentifier }}.From(map: it)).ToList() : ((IEnumerable<Dictionary<string, object>>)map["{{ property.name }}"]).Select(it => {{ property.sub_schema | caseUcfirst | overrideIdentifier }}.From(map: it)).ToList()
+                        Extensions.ToList<Dictionary<string, object>>(map["{{ property.name }}"]).Select(it => {{ property.sub_schema | caseUcfirst | overrideIdentifier }}.From(map: it)).ToList()
                     {%- else -%}
                         {{ property.sub_schema | caseUcfirst | overrideIdentifier }}.From(map: map["{{ property.name }}"] is JsonElement jsonObj{{ loop.index }} ? jsonObj{{ loop.index }}.Deserialize<Dictionary<string, object>>()! : (Dictionary<string, object>)map["{{ property.name }}"])
                     {%- endif %}
@@ -58,7 +59,7 @@ namespace {{ spec.title | caseUcfirst }}.Models
                     {%- endif %}
                 {%- else %}
                     {%- if property.type == 'array' -%}
-                        map["{{ property.name }}"] is JsonElement jsonArrayProp{{ loop.index }} ? jsonArrayProp{{ loop.index }}.Deserialize<{{ property | typeName }}>()! : ({{ property | typeName }})map["{{ property.name }}"]
+                        Extensions.ToList<{{ property | typeName | replace({'List<': '', '>': ''}) }}>(map["{{ property.name }}"])
                     {%- else %}
                         {%- if property.type == "integer" or property.type == "number" %}
                             {%- if not property.required -%}map["{{ property.name }}"] == null ? null :{% endif %}Convert.To{% if property.type == "integer" %}Int64{% else %}Double{% endif %}(map["{{ property.name }}"])