'Assembly.CodeBase' is obsolete: 'Assembly.CodeBase and Assembly.EscapedCodeBase are only included for .NET Framework compatibility. Use Assembly.Location.' (https://aka.ms/dotnet-warnings/SYSLIB0012)

The variable 'ex' is declared but never used

'DateTimeWithin' defines operator == or operator != but does not override Object.Equals(object o)

'DateTimeWithin' defines operator == or operator != but does not override Object.GetHashCode()

The variable 'exception' is declared but never used

'SHA1Managed' is obsolete: 'Derived cryptographic types are obsolete. Use the Create method on the base type instead.' (https://aka.ms/dotnet-warnings/SYSLIB0021)

'SHA1Managed' is obsolete: 'Derived cryptographic types are obsolete. Use the Create method on the base type instead.' (https://aka.ms/dotnet-warnings/SYSLIB0021)

'RijndaelManaged' is obsolete: 'The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.' (https://aka.ms/dotnet-warnings/SYSLIB0022)

'RijndaelManaged' is obsolete: 'The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.' (https://aka.ms/dotnet-warnings/SYSLIB0022)