Specifies the field in the list collection to go to weight

In development, it is sometimes necessary to specify the field to go to weight, the following is the implementation method:

Suppose there is a class of real estate rights, where the parcel code ZDDM value repeats, and we only need one piece of data when the front-end page is displayed, because the public fields are the same;

IEqualityComparer need to introduce the Assembly--using System.Collections;

//collection Specifies field de-weight (parcel code)List<fdcqclient> RESULTFDCQ =NewList<fdcqclient>();varResultdis=resultfdcq.distinct (Newmodelcomparer ()). ToList (); Public classModelcomparer:iequalitycomparer<fdcqclient>        {             Public BOOLEquals (fdcqclient x, fdcqclient y) {returnX.ZDDM = =Y.ZDDM; }             Public intGetHashCode (fdcqclient obj) {returnobj. ZDDM.            GetHashCode (); }        }

Specifies the field in the list collection to go to weight