Using dapper, why is a temp table created in one use of a connection not available in a second use of the same connection

Question

I\'m trying to perform a series of SQL*Server steps using dapper from C#. One step creates a temp table and populates it. Following steps query data from the temp table.

Answer 1

The following works perfectly for me:

db.Open();
db.Execute(
    @"create table #foo (val int not null);
      insert #foo (val) values (123)");
db.Execute(
    @"insert #foo (val) values (456)");
var vals = db.Query(
    @"select * from #foo").ToList();
foreach(var val in vals)
    Console.WriteLine(val);

It also works perfectly if I use:

@"select * from tempdb..#foo"

The only way I can cause it to stop working is, as per my previous answer, to not open the connection first.