c# - Get object from sub list -


i have following data structure. object contains list of b. b contains list of c. 

a {    int id;    list<b>; }  b {    int id;    list<c>; }  c {    int id; }

i have object a, , have b.id, , c.id want find. have linq this:

a = somemethodtogeta(); int bid = 2; int cid = 20; b foundb = a.b.where(item => item.id = bid).first() c foundc = b.c where(item => item.id = cid).first()

i wondering if there way perform above statements single linq statement.

sure, chain 2 single queries:

c foundc = a.b.single(item => item.id == bid)             .c.single(item => item.id == cid)

this throw exception if there not matching b or matching c within b, original queries also. if issues original query (adding null-checking) may more straight-forward.


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