(C#) Zip Append Files Verbose Logging

An application can check verbose LastErrorText if the zip.AppendFiles method does not append the expected files, or if it appends nothing.

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

bool success;
Chilkat.Zip zip = new Chilkat.Zip();
zip.NewZip("qa_output/test1.zip");

// Turn on verbose logging to get more informaiton in the LastErrorText property.
zip.VerboseLogging = true;

bool recurse = true;
zip.AppendFromDir = "qa_data/syncTree";
success = zip.AppendFiles("*",recurse);

// Even if AppendFiles is successful, we can examine the LastErrorText property
// to see what happend.  (This is true for all Chilkat methods.  The LastErrorText always
// contains information even when the method call is successful.  If you have a difficult
// time understanding what happened, then turn on VerboseLogging and have a look at it.
// Make sure to turn off VerboseLogging for production because it could slow down your application.)
Debug.WriteLine(zip.LastErrorText);

// Here is a sample of the LastErrorText for this test:

// ChilkatLog:
//   AppendFiles(62ms):
//     DllDate: Feb 10 2019
//     ChilkatVersion: 9.5.0.76
//     UnlockPrefix: ***
//     Architecture: Little Endian; 64-bit
//     Language: .NET 4.5 / x64 / VS2012
//     VerboseLogging: 1
//     Component successfully unlocked using purchased unlock code.
//     appendFileEx(62ms):
//       FilePattern: *
//       AppendFromDir: qa_data/syncTree
//       PathPrefix: 
//       BaseDir: c:\appData\UnitTest\qa_data\syncTree\
//       InzipBase: 
//       FilenamePart: *
//       IsSpecificFile: 0
//       recurse: 1
//       saveExtraPath: 0
//       archiveOnly: 0
//       includeHidden: 1
//       includeSystem: 1
//       ignoreAccessDenied: 1
//       addFilesMax:
//         addDirNonRecursive:
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\abc\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\data\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\text\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\abc\ghk\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\data\xyz\*]
//           ffWin32OpenDir_fileSpec: [c:\appData\UnitTest\qa_data\syncTree\text\something\*]
//         --addDirNonRecursive
//       --addFilesMax
//       No exclusion patterns.
//       numAdded: 20
//     --appendFileEx
//     Success.
//   --AppendFiles
// --ChilkatLog

success = zip.WriteZipAndClose();
if (success != true) {
    Debug.WriteLine(zip.LastErrorText);
    return;
}