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Diagnostic IDs

Diagnostic IDs are used to identify APIs or patterns that can raise compiler warnings or errors. This can be done via ObsoleteAttribute or ExperimentalAttribute. These can be suppressed at the consumer level for each diagnostic id.

Experimental APIs

OOXML0001

Title: IPackage related APIs are currently experimental

As of v3.0, a new abstraction layer was added in between System.IO.Packaging and DocumentFormat.OpenXml.Packaging.OpenXmlPackage. This is currently experimental, but can be used if needed. This will be stabalized in a future release, and may or may not require code changes.

Suppress warnings

It's recommended that you use an available workaround whenever possible. However, if you cannot change your code, you can suppress warnings through a #pragma directive or a <NoWarn> project setting. If you must use the obsolete or experimental APIs and the OOXMLXXXX diagnostic does not surface as an error, you can suppress the warning in code or in your project file.

To suppress the warnings in code:

// Disable the warning.
#pragma warning disable OOXML0001

// Code that uses obsolete or experimental API.
//...

// Re-enable the warning.
#pragma warning restore OOXML0001

To suppress the warnings in a project file:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
   <TargetFramework>net6.0</TargetFramework>
   <!-- NoWarn below suppresses SYSLIB0001 project-wide -->
   <NoWarn>$(NoWarn);OOXML0001</NoWarn>
   <!-- To suppress multiple warnings, you can use multiple NoWarn elements -->
   <NoWarn>$(NoWarn);OOXML0001</NoWarn>
   <NoWarn>$(NoWarn);OTHER_WARNING</NoWarn>
   <!-- Alternatively, you can suppress multiple warnings by using a semicolon-delimited list -->
   <NoWarn>$(NoWarn);OOXML0001;OTHER_WARNING</NoWarn>
  </PropertyGroup>
</Project>

Note

Suppressing warnings in this way only disables the obsoletion warnings you specify. It doesn't disable any other warnings, including obsoletion warnings with different diagnostic IDs.