Добавьте файлы проекта.

YandexMusic.API/Requests/Album/YGetAlbumBuilder.cs

@@ -0,0 +1,25 @@
+using System.Net;
+
+using YandexMusic.API.Common;
+using YandexMusic.API.Models.Album;
+using YandexMusic.API.Models.Common;
+using YandexMusic.API.Requests.Common;
+using YandexMusic.API.Requests.Common.Attributes;
+
+namespace YandexMusic.API.Requests.Album
+{
+    [YApiRequest(WebRequestMethods.Http.Get, "albums/{albumId}/with-tracks")]
+    public class YGetAlbumBuilder : YRequestBuilder<YResponse<YAlbum>, string>
+    {
+        public YGetAlbumBuilder(YandexMusicApi yandex, AuthStorage auth) : base(yandex, auth)
+        {
+        }
+
+        protected override Dictionary<string, string> GetSubstitutions(string albumId)
+        {
+            return new Dictionary<string, string> {
+                { "albumId", albumId }
+            };
+        }
+    }
+}