Dapper custom database fields and code mapping method when the model field is inconsistent

namespaceyournamespace{/// <summary>    ///Uses The Name value of the Columnattribute specified, otherwise maps as usual. /// </summary>    /// <typeparam name= "T" >The type of the object is this mapper applies to.</typeparam>     Public classColumnattributetypemapper<t>: fallbacktypemapper { Publiccolumnattributetypemapper ():Base(Newsqlmapper.itypemap[] {NewCustompropertytypemap (typeof(T), (type, columnName)=type. GetProperties (). FirstOrDefault (Prop=Prop. GetCustomAttributes (false)                                   . OfType<ColumnMappingAttribute>()                                   . Any (attr= = attr. Name = =columnName)) ),                    NewDefaulttypemap (typeof(T))}) {}} [AttributeUsage (Attributetargets.property, AllowMultiple=true)]     Public classColumnmappingattribute:attribute { Public stringName {Get;Set; } }    Public classFallbackTypeMapper:SqlMapper.ITypeMap {Private ReadOnlyIenumerable<sqlmapper.itypemap>_mappers;  PublicFallbacktypemapper (ienumerable<sqlmapper.itypemap>mappers) {_mappers=mappers; }           PublicConstructorInfo Findconstructor (string[] names, type[] types) {            foreach(varMapperinch_mappers) {                Try{constructorinfo result=Mapper.                    Findconstructor (names, types); if(Result! =NULL)                    {                        returnresult; }                }                Catch(notimplementedexception) {}}return NULL; }          PublicSqlmapper.imembermap Getconstructorparameter (ConstructorInfo constructor,stringcolumnName) {            foreach(varMapperinch_mappers) {                Try                {                    varresult =Mapper.                    Getconstructorparameter (constructor, ColumnName); if(Result! =NULL)                    {                        returnresult; }                }                Catch(notimplementedexception) {}}return NULL; }          PublicSqlmapper.imembermap GetMember (stringcolumnName) {            foreach(varMapperinch_mappers) {                Try                {                    varresult =Mapper.                    GetMember (ColumnName); if(Result! =NULL)                    {                        returnresult; }                }                Catch(notimplementedexception) {}}return NULL; }    }  }

 Public Static IEnumerable loadwithcustommapping () {    using (var conn = opendbconnection ())    {        Dapper.SqlMapper.SetTypeMap (typeofnew  columnattributetypemapper ());         return Conn. Query ("select TOP caid,caname,en from Cityarea");}    }

Dapper custom database fields and code mapping method when the model field is inconsistent