'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization.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'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization.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)

Comparison to integral constant is useless; the constant is outside the range of type 'uint'

Comparison to integral constant is useless; the constant is outside the range of type 'uint'

'Buffer.BlockCopy' expects the number of bytes to be copied for the 'count' argument. Using 'Array.Length' may not match the number of bytes that needs to be copied. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2018)

'Buffer.BlockCopy' expects the number of bytes to be copied for the 'count' argument. Using 'Array.Length' may not match the number of bytes that needs to be copied. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2018)

'Buffer.BlockCopy' expects the number of bytes to be copied for the 'count' argument. Using 'Array.Length' may not match the number of bytes that needs to be copied. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2018)

Non-nullable field 'Topic' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Possible null reference assignment.