c# - LINQ Cannot assign void to Implicitly Typed variable -


i trying convert set of data object of linq getting error :

cannot assign void implicitly typed variable

i can understand have make use of select() function not able figure out how it.

data set: 

[zip]   [fips]  [county]    [stateabbr] [statename] 90210   12345   county1     ca      california 90210   12346   county2     ca      california 90210   12347   county3     ca      california 90210   12348   county4     ca      california

code snippet:

 var zipinfo = results.foreach(z => new zipinfoentity{         zip = z.zip,         statename = z.statename,         stateabbr = z.stateabbr,         fipscountyinfo = new list<fipscountyinfoentity>{             new fipscountyinfoentity {                 fips = z.fips,                 county = z.county             }         }     });  public zipinfoentity {     public string zip {get;set;}     public string statename {get;set;}     public string stateabbr {get;set;}     public ilist<fipscountyinfoentity> fipscountyinfo {get;set;} }  public fipscountyinfoentity {     public string fips {get;set;}     public string county {get;set;} }

what trying achieve object of zipinfoentity. if see dataset, has zip, stateabbr , statename same rows. county , fips changing.

so final object should like

{    zip: "90210",    stateabbr: "ca",    statename: "california",    fipscountyinfo: [         {fips: "12345", county: "county1"},          {fips: "12346", county: "county2"},         ...] }

first of all, foreach returns void , you're trying assign variable cannot in c#.

so begin should have :

var zipinfo = results.select(z => new zipinfoentity{     zip = z.zip,     statename = z.statename,     stateabbr = z.stateabbr,

and here try assign object of type fipscountyinfoentity collection of fipscountyinfoentity ( ilist<fipscountyinfoentity> ). , should instead assign new collection :

    fipscountyinfo = new list<fipscountyinfoentity>(new fipscountyinfo[] {          new fipscountyinfoentity{             fips = z.fips,             county = z.county         }     } });

or change property of type fipscountyinfoentity , use did :

    fipscountyinfo = new fipscountyinfoentity{         fips = z.fips,         county = z.county     } });

edit :
specified in comment, retrieve 1 element can use firstordefault() linq method @ end eg. :

var zipinfo = results.select(z => new zipinfoentity{     // ... same code above }).firstordefault();

or :

var zipinfo = results.firstordefault(z => new zipinfoentity{     // ... same code above     return true; // needs return true on object want return });

edit2 :
1 element collection of fipscountyinfoentity suggest doing such :

var zipinfo = results.select(e => new zipinfoentity      {         zip = z.zip,         statename = z.statename,         stateabbr = z.stateabbr,         fipscountyinfo = results.select(z => new fipscountyinfoentity         {             fips = z.fips,             county = z.county         }     }).firstordefault();

or using groupby :

var zipinfo =  results.groupby(e => new { e.zip, e.statename, e.stateabbr }).select(e => new zipinfoentity         {             zip = e.key.zip,             statename = e.key.statename,             stateabbr = e.key.stateabbr,             fipscountyinfo = e.select(c => new fipscountyinfoentity             {                 fips = c.fips,                 county = c.county             }).tolist()         });

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