Linux上のClosedXMLで画像データを扱うときにSystem.DllNotFoundExceptionが発生する

Linux（Ubuntu 18.04）環境に.NET Core SDK 2.2をインストールし、ClosedXmlで画像を含むExcelファイルを扱おうとしたところ、下記の様な例外が発生して実行出来ません。

System.TypeInitializationException: The type initializer for 'Gdip' threw an exception. ---> System.DllNotFoundException: Unable to load shared library 'libdl' or one of its dependencies. In order to help diagnose loading problems, consider setting th
 e LD_DEBUG environment variable: liblibdl: cannot open shared object file: No such file or directory at Interop.Libdl.dlopen(String fileName, Int32 flag)
     at System.Drawing.SafeNativeMethods.Gdip.LoadNativeLibrary()
     at System.Drawing.SafeNativeMethods.Gdip..cctor()
     --- End of inner exception stack trace ---
     at System.Drawing.SafeNativeMethods.Gdip.GdipLoadImageFromDelegate_linux(StreamGetHeaderDelegate getHeader, StreamGetBytesDelegate getBytes, StreamPutBytesDelegate putBytes, StreamSeekDelegate doSeek, StreamCloseDelegate close, StreamSizeDelegate size, IntPtr& image)
     at System.Drawing.Image.InitFromStream(Stream stream)
     at ClosedXML.Excel.Drawings.XLPicture..ctor(IXLWorksheet worksheet, Stream stream)
     at ClosedXML.Excel.Drawings.XLPictures.Add(Stream stream)
     at ClosedXML.Excel.XLWorkbook.LoadDrawings(WorksheetPart wsPart, IXLWorksheet ws)
     at ClosedXML.Excel.XLWorkbook.LoadSpreadsheetDocument(SpreadsheetDocument dSpreadsheet)
     at ClosedXML.Excel.XLWorkbook.LoadSheets(Stream stream)

.NET Core Runtimeインストール時に依存関係が処理されていないことが原因です。下記のコマンドを実行してGDI+関連のライブラリをインストールすると解決します。

sudo apt install libc6-dev 
sudo apt install libgdiplus
cd /usr/lib
sudo ln -s <a rel="noreferrer noopener" target="_blank" href="http://libgdiplus.so/">libgdiplus.so</a> gdiplus.dll

環境によってはLD_LIBRARY_PATHの設定も必要になるようです。