Hello.
ODP.NET Core is already in prelease, but still not supports elementary read blob/clob fields.
This simple code falls with "TTC Errror":
using (OracleConnection conn = new OracleConnection("Data Source=db;User ID=userid;Password=pass;Pooling=False;"))
{
conn.Open();
var sql = "SELECT id, blobdata FROM templ";
OracleCommand cmd = new OracleCommand(sql, conn);
cmd.CommandType = CommandType.Text;
OracleDataReader reader = cmd.ExecuteReader();
using (reader)
{
while (reader.Read()) //TTC Error
{
}
}