c# - Cannot assign a void to an implicitly-typed local variable using Entity Framework 6 -

i using wcf refrence call last row quote table. wrote method in wcf application last row, not know it works or not(i trying test it):

public void getlastquote() {     using (truckdb db = new truckdb())     {         var quote = (from qdata in db.quotes                      qdata.id == qdata.represetativeid                      orderby qdata.id descending                      select qdata).first();     } } 

in wpf application using wcf reference , calling on getlastquoteasync() method, giving me following error:

cannot assign void implicitly-typed local variable

and here method in wpf application trying call getlastquoteasync() reference.

private async void wlistofbills_loaded(object sender, routedeventargs e) {     using (truckserviceclient client = new truckserviceclient())     {         var quote = await client.getlastquoteasync(); // -> error lies.         var bills = await client.getlistofbillsasync(quote.item.id);         if (bills == null)         {             dgfloor.isenabled = true;             return;         }         dgfloor.itemssource = bills.select(x => new listofbillsview         {             code = x.stockcode,             group = x.groupname,             description = x.stockdescription,             qty = x.quantity,             length = x.length,             width = x.width,             weight = x.weight,             price_m = x.pricepermeter,             cost = x.cost,             section = x.trucksection.tostring()         }).tolist();     } } 

i have seen people same question, not understand how implement solutions in own problem. if help, appreciate allot! :)

you want call query returning, method wrapping around query returning nothing, because type void.

i assume want return object of type quote, need change method this:

//change void quote public quote getlastquote() {     using (truckdb db = new truckdb())     {         var quote = (from qdata in db.quotes                      qdata.id == qdata.represetativeid                      orderby qdata.id descending                      select qdata).first();         //new         return quote;     } } 

also getlastquote() not same getlastquoteasync() have posted wrong method, throw same error?

if there async version of method should similar this:

public async task<quote> getlastquote() {     using (truckdb db = new truckdb())     {         var quote = (from qdata in db.quotes                      qdata.id == qdata.represetativeid                      orderby qdata.id descending                      select qdata).firstasync(); /*note async method here*/         //new         return await quote;     } }