Dereference of a possibly null reference.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 's' in 'byte[] Encoding.GetBytes(string s)'.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Dereference of a possibly null reference.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 's' in 'byte[] Encoding.GetBytes(string s)'.