After updating from .net 4 to higher version e.g. 4.5, 4.72 I get the below errors. I updated references etc.
Update was performed manually and with TargetFrameworkMigrator.
Error 9209 'Note.Svc.Models.ps_AddNoteBrs_Result' does not contain a definition for 'Modified' and no extension method 'Modified' accepting a first argument of type 'Note.Svc.Models.ps_AddNoteBrs_Result' could be found (are you missing a using directive or an assembly reference?) C:\Work\Note\Note.Svc\TakeAddSvc.svc.cs 1492 31 Note.Svc
Error 9224 'Note.Svc.Models.ps_AddNoteBrs_Result' does not contain a definition for 'Modified' and no extension method 'Modified' accepting a first argument of type 'Note.Svc.Models.ps_AddNoteBrs_Result' could be found (are you missing a using directive or an assembly reference?) C:\Work\Note\Note.Svc\TakeAddSvc.svc.cs 1500 31 Note.Svc
Error 9249 'Note.Svc.Models.ps_AddNoteBrs_Result' does not contain a definition for 'Modified' and no extension method 'Modified' accepting a first argument of type 'Note.Svc.Models.ps_AddNoteBrs_Result' could be found (are you missing a using directive or an assembly reference?) C:\Work\Note\Note.Svc\TakeAddSvc.svc.cs 1513 35 Note.Svc
Error 4777 'Note.Svc.Models.NoteRun' does not contain a definition for 'Checked' and no extension method 'Checked' accepting a first argument of type 'Note.Svc.Models.NoteRun' could be found (are you missing a using directive or an assembly reference?) C:\Work\Note\Note.Svc\QualityControlTrackingService.svc.cs 511 58 Note.Svc
Error 5712 Cannot implicitly convert type 'System.Collections.Generic.List<Note.Svc.Models.ps_RerportNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' to 'System.Collections.Generic.List<Note.Svc.Models.ps_RerportNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' C:\Work\Note\Note.Svc\AddRepSvc.svc.cs 647 42 Note.Svc
Error 5700 Cannot implicitly convert type 'System.Collections.Generic.List<Note.Svc.Models.ps_ReportAddNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' to 'System.Collections.Generic.List<Note.Svc.Models.ps_ReportAddNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' C:\Work\Note\Note.Svc\AddRepSvc.svc.cs 646 37 Note.Svc
Error 5838 Cannot implicitly convert type 'System.Collections.Generic.List<Note.Svc.Models.ps_ReportAddNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' to 'System.Collections.Generic.List<Note.Svc.Models.ps_ReportAddNote_Result> [c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.8\mscorlib.dll]' C:\Work\Note\Note.Svc\AddRepSvc.svc.cs 664 37 Note.Svc