getting there

RemoteFrameBuffer/Common/RgbFrameBuffer.cs

@@ -44,7 +44,7 @@
 
         public void CopyRegion(UInt16 source_x, UInt16 source_y, UInt16 width, UInt16 height, UInt16 target_x, UInt16 target_y) => this.SetRegion(this._frame, source_x, source_y, width, height, target_x, target_y);
 
-        public void SaveBitmap(String filename)
+        public Byte[] ToBitmap()
         {
 #warning Endianness is straight up ignored
             Int32 rowBytes = (this.Width * 3) + 3;
@@ -72,7 +72,12 @@
                     buf[pos + 2] = this._frame[this.Height - j - 1][i].Red;
                 }
             }
-            File.WriteAllBytes(filename, buf);
+            return buf;
+        }
+
+        public void SaveBitmap(String filename)
+        {
+            File.WriteAllBytes(filename, this.ToBitmap());
         }
     }
 }