Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Nullability of type of parameter 'obj' doesn't match overridden member (possibly because of nullability attributes).

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

Dereference of a possibly null reference.

Non-nullable field '_backupFrameIndexBuf' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Nullability of type of parameter 'obj' doesn't match overridden member (possibly because of nullability attributes).

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

Non-nullable field 'IterationCount' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field '_globarColorTable' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'GlobarColorTable' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'LocalColorTable' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field '_colorTableIdList' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference argument for parameter 'writeableBitmap' in 'void GifDecoder.RenderFrame(int fIndex, WriteableBitmap writeableBitmap, bool forceClear = false)'.