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EPPlus version 8.4.0 (#2222)
* EPPlus version 8.4.0 * Added vs2026 to appveyor config. * Added .NET 10 install in appveyor.yml, as vs2026 is not available. * Fixed appveyor.yml. * EPPlus version 8.4.0 * Updated version date.
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‎appveyor8.yml‎

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version: 8.3.1.{build}
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version: 8.4.0.{build}
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branches:
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only:
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- develop8
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configuration: release
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image: Visual Studio 2022
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install:
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- ps: |
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Invoke-WebRequest -Uri 'https://dot.net/v1/dotnet-install.ps1' -UseBasicParsing -OutFile "$env:temp\dotnet-install.ps1"
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& $env:temp\dotnet-install.ps1 -Architecture x64 -Version '10.0.100' -InstallDir "$env:ProgramFiles\dotnet"
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init:
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- ps: >-
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Update-AppveyorBuild -Version "8.3.1.$env:appveyor_build_number-$(Get-Date -format yyyyMMdd)-$env:appveyor_repo_branch"
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Update-AppveyorBuild -Version "8.4.0.$env:appveyor_build_number-$(Get-Date -format yyyyMMdd)-$env:appveyor_repo_branch"
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Write-Host "8.3.1.$env:appveyor_build_number-$(Get-Date -format yyyyMMdd)-$env:appveyor_repo_branch"
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Write-Host "8.4.0.$env:appveyor_build_number-$(Get-Date -format yyyyMMdd)-$env:appveyor_repo_branch"
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dotnet_csproj:
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patch: true
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file: '**\*.csproj'
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version: '{version}'
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assembly_version: 8.3.1.{build}
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file_version: 8.3.1.{build}
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assembly_version: 8.4.0.{build}
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file_version: 8.4.0.{build}
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nuget:
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project_feed: true
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before_build:

‎docs/articles/fixedissues.md‎

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# Features / Fixed issues - EPPlus 8
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## Version 8.4.0
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### Features
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* Added targeting framework .NET 10.
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### Fixed issues
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* Fixed an issue where the DATEDIF function returned incorrect results for the number of months.
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* Fixed an issue where EPPlus incorrectly evaluated the expression TRUE=1 as TRUE instead of FALSE.
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* Resolved various issues in CEILING, ISOCEILING, CEILING.PRECISE, CEILING.MATH and FLOOR, FLOOR.PRECISE, FLOOR.MATH functions, especially when handling negative multiples.
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The TIME function was previously limited to the range 00:00:00–23:59:59. It now behaves similar to Excel, supporting overflow and negative values.
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* Fixed an issue where the TIME function did not handle array input correctly.
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* Chart Style Manager reset the series color cycle when multiple chart types or a secondary axis were used.
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* Direct input of errors like #DIV/0!, #NAME?, #NULL! or #GETTING_DATA was not supported in formulas and arrays.
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* ISBLANK("") incorrectly returned true.
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* ERROR.TYPE returned a #VALUE! error when supplying a #DIV/0! error.
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* INDIRECT("") now returns a #REF! error.
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* CONCATENATE(TRUE,FALSE) now returns the bool-strings in upper case, as Excel.
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* REPT("ab",-1) now returns a #VALUE error.
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* Fixed several issues with the MOD function and negative arguments.
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* POWER(0,0) now returns a #NUM! error.
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* Added support for preserving conditional formatting in pivot tables placed in the <extLst> element.
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* The ISNUMBER now returns false on Boolean values.
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* The CHOOSE function incorrectly returned error (i.e. #DIV/0!), if supplies as conditional arguments.
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* The UNICHAR function did return the correct character.
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* The TEXT function failed, if a null value was supplied as format argument.
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* VLOOKUP could fail to find an item in the cell if the first row was the header. Excel ignores header values in the binary search.
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* `ExcelRangeBase.DimensionByValue` returned the wrong range in rare cases.
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* `ExcelRangeBase.Richtext` caused a null `NullReferenceException` when it hade been disposed.
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## Version 8.3.1
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* Using an array as denominator when first value is 0 returns a single ´#DIV0!´ error.
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* The ´FILTER´ function did not work correctly when filtering on columns.

‎src/Directory.Build.props‎

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<DefineConstants>Core;NET90</DefineConstants>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(TargetFramework)' == 'net10.0'">
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<DefineConstants>Core;NET100</DefineConstants>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(TargetFramework)' == 'net481'">
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<DefineConstants>NET481;NETFULL</DefineConstants>
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</PropertyGroup>

‎src/EPPlus.Interfaces/EPPlus.Interfaces.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>net9.0;net8.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.1.0.0</AssemblyVersion>
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<FileVersion>8.1.0.0</FileVersion>
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<Version>8.1.0</Version>
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<TargetFrameworks>net10.0;net9.0;net8.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.4.0.0</AssemblyVersion>
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<FileVersion>8.4.0.0</FileVersion>
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<Version>8.4.0</Version>
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<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
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<PackageLicenseFile>license.md</PackageLicenseFile>
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<RepositoryType>git</RepositoryType>

‎src/EPPlus.System.Drawing/EPPlus.System.Drawing.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>net9.0;net8.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.1.0.0</AssemblyVersion>
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<FileVersion>8.1.0.0</FileVersion>
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<Version>8.1.0</Version>
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<TargetFrameworks>net10.0;net9.0;net8.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.4.0.0</AssemblyVersion>
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<FileVersion>8.4.0.0</FileVersion>
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<Version>8.4.0</Version>
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<SignAssembly>true</SignAssembly>
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<PackageLicenseFile>license.md</PackageLicenseFile>
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<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
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<ProjectReference Include="..\EPPlus.Interfaces\EPPlus.Interfaces.csproj" />
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</ItemGroup>
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<ItemGroup Condition="'$(TargetFramework)' != 'net35' and '$(TargetFramework)' != 'net462' and '$(TargetFramework)' != 'net9.0'">
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<ItemGroup Condition="'$(TargetFramework)' != 'net35' and '$(TargetFramework)' != 'net462' and '$(TargetFramework)' != 'net9.0' and '$(TargetFramework)' != 'net10.0'">
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<PackageReference Include="System.Drawing.Common" />
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</ItemGroup>
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<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
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<PackageReference Include="System.Drawing.Common" VersionOverride="9.0.1" />
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<PackageReference Include="System.Drawing.Common" VersionOverride="9.0.11" />
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</ItemGroup>
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<ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
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<PackageReference Include="System.Drawing.Common" VersionOverride="10.0.1" />
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</ItemGroup>
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<ItemGroup>
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<None Include="EPPlusLogo.png">
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<Pack>True</Pack>

‎src/EPPlus/EPPlus.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>net8.0;net9.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.3.1.0</AssemblyVersion>
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<FileVersion>8.3.1.0</FileVersion>
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<Version>8.3.1</Version>
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<TargetFrameworks>net8.0;net9.0;net10.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
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<AssemblyVersion>8.4.0.0</AssemblyVersion>
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<FileVersion>8.4.0.0</FileVersion>
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<Version>8.4.0</Version>
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<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
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<PackageProjectUrl>https://epplussoftware.com</PackageProjectUrl>
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<Authors>EPPlus Software AB</Authors>
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<PackageReadmeFile>readme.md</PackageReadmeFile>
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<Copyright>EPPlus Software AB</Copyright>
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<PackageReleaseNotes>
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EPPlus 8.3.1
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EPPlus 8.4.0
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IMPORTANT NOTICE!
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From version 5 EPPlus changes the license model using a dual license, Polyform Non Commercial / Commercial license.
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EPPlus will still have the source available, but for non Polyform NC compliant projects, EPPlus will provide a commercial license.
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Commercial licenses can be purchased from https://epplussoftware.com
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This applies to EPPlus version 5 and later. Earlier versions are still licensed LGPL.
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## Version 8.3.1
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## Version 8.4.0
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* Added target framework .NET 10.
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Minor bug fixes. See https://epplussoftware.com/Developers/MinorFeaturesAndIssues
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## Version 8.3.1
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Minor bug fixes.
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## Version 8.3.0
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* Support for adding, updating and removing external connections and query tables. See https://github.com/EPPlusSoftware/EPPlus/wiki/External-Connections-and-Query-Tables
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* Support for adding pivot tables with external connections as data source.
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A list of fixed issues can be found here https://epplussoftware.com/docs/7.0/articles/fixedissues.html
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Version history
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8.4.0 20251212 Updated target frameworks. Minor bug fixes.
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8.3.1 20251128 Minor bug fixes.
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8.3.0 20251120 Connections and query tables support. Minor features and bug fixes. See https://epplussoftware.com/Developers/MinorFeaturesAndIssues
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8.2.1 20251012 Minor bug fixes.
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<PackageReference Include="System.Text.Encoding.CodePages" VersionOverride="9.0.3" />
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<PackageReference Include="System.Security.Cryptography.Xml" VersionOverride="9.0.3" />
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</ItemGroup>
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<!-- TargetFramework net10.0, remove when GitHub actions and AppVeyor support is available. -->
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<!--
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<ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
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<PackageReference Include="Microsoft.Extensions.Configuration.Json" VersionOverride="10.0.0" />
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<PackageReference Include="Microsoft.IO.RecyclableMemoryStream" />
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<PackageReference Include="System.Text.Encoding.CodePages" VersionOverride="10.0.0" />
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<PackageReference Include="System.Security.Cryptography.Xml" VersionOverride="10.0.0" />
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</ItemGroup>
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-->
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<ItemGroup>
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<Compile Remove="LoadFunctions\HeaderReader.cs" />
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</ItemGroup>

‎src/EPPlus/EPPlusLicense.cs‎

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{
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private static ExcelPackageConfiguration _configuration = new ExcelPackageConfiguration();
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static bool _licenseSet = false;
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internal const string _versionDate = "2025-08-15";
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internal const string _versionDate = "2025-12-12";
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/// <summary>
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/// The license key used for a commercial license.
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/// </summary>

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