Resolved : ORA 00911 invalid character inline query C# or Java

Generally the following code we use to write as inline query

OracleConnection conn = new OracleConnection(-myConnectionString-);
conn.Open();
OracleCommand command = new OracleCommand("select userid from usermaster;", conn);
var v = command.ExecuteReader();
OracleCommand command = new OracleCommand("select userid from \"usermaster\";", conn);
var v = command.ExecuteReader();

Same query would work in PL/SQL Developer or command prompt but won’t from your Code.

it’s because you have put semicolon (‘;’) at the end.

Remove the ; semicolon it would work.