Joining Object Array keys

Question

I have an object Array

Dummy[] arr = {Dummy1, Dummy2}

I want to join comma separated keys of each Dummy object in that array. This doesn't work.

string blah = string.Join(", ", arr)

Override the toString() of Dummy object to return the Key! Or select the Key and join — N.S
– N.S, Commented Nov 7, 2019 at 16:01
It "doesn't work" because you've made no attempt to access the key. — itsme86
– itsme86, Commented Nov 7, 2019 at 16:03
@itsme86 , that was my problem. I couldn't get key value. Tried arr.Key, that doesn't work, obviously — rakamakafo
– rakamakafo, Commented Nov 7, 2019 at 16:10

StriplingWarrior · Accepted Answer · 2019-11-07 16:01:45Z

4

Something like this?

string blah = string.Join(", ", arr.Select(dummy => dummy.Key));

answered Nov 7, 2019 at 16:01

StriplingWarrior

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