gallery manager WIP

Azaion.Annotator/DTO/Label.cs

@@ -1,4 +1,5 @@
 using System.Globalization;
+using System.IO;
 using System.Windows;
 using Newtonsoft.Json;
 
@@ -146,7 +147,17 @@ public class YoloLabel : Label
             return null;
         }
     }
-    
+
+    public static async Task<List<YoloLabel>> ReadFromFile(string filename, CancellationToken cancellationToken)
+    {
+        var str = await File.ReadAllTextAsync(filename, cancellationToken);
+
+        return str.Split(Environment.NewLine)
+            .Select(Parse)
+            .Where(ann => ann != null)
+            .ToList()!;
+    }
+
     public override string ToString() => $"{ClassNumber} {CenterX:F5} {CenterY:F5} {Width:F5} {Height:F5}".Replace(',', '.');
     
 }