The variable 'e' is declared but never used

The variable 'e' is declared but never used

The variable 'e' is declared but never used

The variable 'e' is declared but never used

The variable 'e' is declared but never used

The variable 'e' is declared but never used

'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization.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'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization.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

'SHA256Managed' is obsolete: 'Derived cryptographic types are obsolete. Use the Create method on the base type instead.' (https://aka.ms/dotnet-warnings/SYSLIB0021)

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