nuget CSharpCode.SharpZipLib 這個包
using (var TemplateZip = new ICSharpCode.SharpZipLib.Zip.ZipFile(tempPath))
{
var FileCheck = TemplateZip.Cast<ICSharpCode.SharpZipLib.Zip.ZipEntry>();
if (FileCheck.Count(x => x.Name == "xx.xml") == 0
|| FileCheck.Count(x => x.Name.Contains("Package/")) == 0)
{
return null;
}
}