c# - What is the right and efficient way to retrieve data using Entity Framework 6 -

i have 2 tables:

t1 {   columns: **a**, b, c }  t2 {   columns: d, e, f, **a** } 

t1 has 1 many connection t2 using foreign key (column a).

i'm trying retrieve list of f in case a=1,b=2,e=3.

what right , efficient way retrieve data?

• is join statement?
• is retrieving t1 (where a=1,b=2) including t2 , looping on result (and eliminate irrelevant t2)?
• some other way?

var lst = (from t1 in context.t1         join t2 in context.t2 on t1.a equals t2.a         t1.a == 1 && t1.b == 2 && t2.e == 3         select t2.f).tolist(); 

• join tables
• filter in clause
• select 1 property interested in