Cannot read with AcadSharp dwg file created with AcadSharp

Describe the bug Cannot read with AcadSharp a dwg file written with AcadSharp.

To Reproduce I’ve created a dwg file with AcadSharp and then saved. All the documents section (such as the Header) are as default. When I try to load the file with DwgReader it throws the following exception: ACadSharp.Exceptions.DwgNotSupportedException: 'Dwg version not recognised.

Write dwg code:

// new document
ACadSharp.CadDocument doc = new ACadSharp.CadDocument();
// write file
ACadSharp.IO.DwgWriter writer = new ACadSharp.IO.DwgWriter("Test.dwg", doc);
writer.Write();

Read dwg code:

ACadSharp.CadDocument loaded = ACadSharp.IO.DwgReader.Read("Test.dwg");

Full exception and stack trace: ACadSharp.Exceptions.DwgNotSupportedException: 'Dwg version not recognised

at ACadSharp.IO.DWG.DwgFileHeader.CreateFileHeader(ACadVersion version) in C:\Users\stage1\source\repos\ACadSharp\ACadSharp\IO\DWG\FileHeaders\DwgFileHeader.cs:line 37
at ACadSharp.IO.DwgReader.readFileHeader() in C:\Users\stage1\source\repos\ACadSharp\ACadSharp\IO\DWG\DwgReader.cs:line 225
at ACadSharp.IO.DwgReader.Read() in C:\Users\stage1\source\repos\ACadSharp\ACadSharp\IO\DWG\DwgReader.cs:line 97
at ACadSharp.IO.DwgReader.Read(String filename, DwgReaderConfiguration configuration, NotificationEventHandler notification) in C:\Users\stage1\source\repos\ACadSharp\ACadSharp\IO\DWG\DwgReader.cs:line 83
at ACadSharp.IO.DwgReader.Read(String filename, NotificationEventHandler notification) in C:\Users\stage1\source\repos\ACadSharp\ACadSharp\IO\DWG\DwgReader.cs:line 66

Expected behavior No exception

Screenshots From CadUtils: It return AcadVersion.Unknown

[DomCR]

perfect, I’ll open a branch to apply a fix to manually dispose the stream to avoid this issue in the future.

[sv-ed]

Well… yes, that worked, thank you 😃

This also solves the issue that the stream wasn’t closed successfully and the file resulted opened by another process, if I tried to open if after the write. Closing the program closed the stream too so the file was openable.