Use common library in Love

58_Love/csharp/StringBuilderExtensions.cs

@@ -0,0 +1,16 @@
+using System.Text;
+
+namespace Love;
+
+internal static class StringBuilderExtensions
+{
+    internal static StringBuilder AppendLines(this StringBuilder builder, int count)
+    {
+        for (int i = 0; i < count; i++)
+        {
+            builder.AppendLine();
+        }
+
+        return builder;
+    }
+}