查询并验证 TransactionScope 隔离级别

void Main()
{
    this.ExecuteQuery<string>(@"SELECT  CASE transaction_isolation_level
                                      WHEN 0 THEN 'Unspecified'
                                      WHEN 1 THEN 'ReadUncommitted'
                                      WHEN 2 THEN 'ReadCommitted'
                                      WHEN 3 THEN 'Repeatable'
                                      WHEN 4 THEN 'Serializable'
                                      WHEN 5 THEN 'Snapshot'
                                    END AS TRANSACTION_ISOLATION_LEVEL
                            FROM    sys.dm_exec_sessions
                            WHERE   session_id = @@SPID;", new object[] { }).Dump();

    using (var tran = new TransactionScope(TransactionScopeOption.Required, new TimeSpan(0, 0, 120)))
    {
        this.ExecuteQuery<string>(@"SELECT  CASE transaction_isolation_level
                                      WHEN 0 THEN 'Unspecified'
                                      WHEN 1 THEN 'ReadUncommitted'
                                      WHEN 2 THEN 'ReadCommitted'
                                      WHEN 3 THEN 'Repeatable'
                                      WHEN 4 THEN 'Serializable'
                                      WHEN 5 THEN 'Snapshot'
                                    END AS TRANSACTION_ISOLATION_LEVEL
                            FROM    sys.dm_exec_sessions
                            WHERE   session_id = @@SPID;", new object[] { }).Dump();
    }
    
    var transactionOptions = new System.Transactions.TransactionOptions();
    transactionOptions.IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted;
    using (var transactionScope = new System.Transactions.TransactionScope(System.Transactions.TransactionScopeOption.Required, transactionOptions))
    {
        this.ExecuteQuery<string>(@"SELECT  CASE transaction_isolation_level
                                      WHEN 0 THEN 'Unspecified'
                                      WHEN 1 THEN 'ReadUncommitted'
                                      WHEN 2 THEN 'ReadCommitted'
                                      WHEN 3 THEN 'Repeatable'
                                      WHEN 4 THEN 'Serializable'
                                      WHEN 5 THEN 'Snapshot'
                                    END AS TRANSACTION_ISOLATION_LEVEL
                            FROM    sys.dm_exec_sessions
                            WHERE   session_id = @@SPID;", new object[] { }).Dump();
    }
}

// Define other methods and classes here