Getting problem in ConnectionId, Session ID in Sql Server

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.NET3.5

.NET

C#5.0

, +

SqlConnection con=new Sqlconnection("Data Source=...")
con.open();
when I opened a Connection through .Net Application
and I have executed this select query in Sql Server

Select SESSION_ID,
C.CONNECT_TIME,
C.CONNECTION_ID, 
C.NUM_READS,
C.NUM_WRITES from  SYS.DM_EXEC_CONNECTIONS .

I found connectionids, sessionids.
for every request from applications will it creates
new ConnectionId and Session id ?

what are the difference between sessionid and connection id
If I create #tempTable through application is it unique for each client login
I tried a lot by googling , i did't find please help out