The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.

It is no longer necessary to use the Microsoft.NET.Sdk.WindowsDesktop SDK. Consider changing the Sdk attribute of the root Project element to 'Microsoft.NET.Sdk'.

Possible null reference argument for parameter 'fileName' in 'X509Certificate2.X509Certificate2(string fileName, string? password)'.

'ComboBox' is obsolete: 'Use RoundedComboBox instead.'

'ComboBox' is obsolete: 'Use RoundedComboBox instead.'

'Rfc2898DeriveBytes.Rfc2898DeriveBytes(string, byte[], int)' is obsolete: 'The default hash algorithm and iteration counts in Rfc2898DeriveBytes constructors are outdated and insecure. Use a constructor that accepts the hash algorithm and the number of iterations.' (https://aka.ms/dotnet-warnings/SYSLIB0041)

'RijndaelManaged' is obsolete: 'The Rijndael and RijndaelManaged types are obsolete.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

'Rfc2898DeriveBytes.Rfc2898DeriveBytes(string, byte[], int)' is obsolete: 'The default hash algorithm and iteration counts in Rfc2898DeriveBytes constructors are outdated and insecure. Use a constructor that accepts the hash algorithm and the number of iterations.' (https://aka.ms/dotnet-warnings/SYSLIB0041)

'RijndaelManaged' is obsolete: 'The Rijndael and RijndaelManaged types are obsolete.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

'RNGCryptoServiceProvider' is obsolete: 'RNGCryptoServiceProvider is obsolete. To generate a random number, use one of the RandomNumberGenerator static methods instead.' (https://aka.ms/dotnet-warnings/SYSLIB0023)