sql - Transaction With db context in C# -

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i trying commit transaction c# context:

private testdbentities context =new testdbentities(connectionstring);   this.context.connection.open(); system.data.common.dbtransaction transaction = this.context.connection.begintransaction(); dbcommand command = this.context.connection.createcommand(); command.commandtext = "some insert/update query"; command.executenonquery(); transaction.commit();

but error message:

"the query syntax not valid. near identifier table_name, line 1, column 8."

query seems fine when directly execute directly on sql management studio. there solution? 

 sqlconnection conn = new sqlconnection();   sqlcommand command1 = new sqlcommand();   sqlcommand command2 = new sqlcommand();               sqltransaction trans = conn.begintransaction();             command1.transaction = trans;             command2.transaction = trans;              try             {                 command1.executenonquery();                 command2.executenonquery();                 trans.commit();             }             catch (sqlexception ex)             {                 trans.rollback();             }                         {              }

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