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

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

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

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

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

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

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

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

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

The variable 'ex' is declared but never used

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'WebRequest.Create(Uri)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

'WebRequest.Create(Uri)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

'WebRequest.Create(Uri)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

'WebRequest.Create(Uri)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'

'X509Certificate2.PrivateKey' is obsolete: 'X509Certificate2.PrivateKey is obsolete. Use the appropriate method to get the private key, such as GetRSAPrivateKey, or use the CopyWithPrivateKey method to create a new instance with a private key.'