OPC Compliance error [M4.1]: there is more than one core properties relationship in the package ! POI will use only the first, but other software may reject this file.

OPC Compliance error [M4.1]: there is more than one core properties relationship in the package ! POI will use only the first, but other software may reject this file.

OPC Compliance error [M4.1]: there is more than one core properties relationship in the package ! POI will use only the first, but other software may reject this file.

OPC Compliance error [M4.1]: there is more than one core properties relationship in the package ! POI will use only the first, but other software may reject this file.

D:\a\npoi\npoi\main\POIFS\Crypt\Standard\StandardDecryptor.cs(225,20): warning CS0114: 'CipherInputStream.Read(byte[])' hides inherited member 'InputStream.Read(byte[])'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword. [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\POIFS\Crypt\Standard\StandardDecryptor.cs(262,21): warning CS0114: 'CipherInputStream.Skip(long)' hides inherited member 'InputStream.Skip(long)'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword. [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\POIFS\Crypt\Standard\StandardDecryptor.cs(305,21): warning CS0114: 'CipherInputStream.MarkSupported()' hides inherited member 'ByteArrayInputStream.MarkSupported()'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword. [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\POIFS\FileSystem\POIFSFileSystem.cs(66,30): warning CS0108: 'POIFSFileSystem.CreateNonClosingInputStream(Stream)' hides inherited member 'NPOIFSFileSystem.CreateNonClosingInputStream(Stream)'. Use the new keyword if hiding was intended. [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\SS\Formula\Eval\FunctionEval.cs(62,37): warning CS0628: 'FunctionEval.functions': new protected member declared in sealed type [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\SS\UserModel\Workbook.cs(447,14): warning CS0108: 'IWorkbook.Close()' hides inherited member 'ICloseable.Close()'. Use the new keyword if hiding was intended. [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\Util\StringUtil.cs(514,49): warning CS0472: The result of the expression is always 'false' since a value of type 'int' is never equal to 'null' of type 'int?' [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\SS\Formula\Functions\FinanceFunction.cs(96,13): warning CS0162: Unreachable code detected [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]

D:\a\npoi\npoi\main\SS\Formula\Functions\Countif.cs(341,21): warning CS0162: Unreachable code detected [D:\a\npoi\npoi\main\NPOI.Core.csproj::TargetFramework=netstandard2.0]