Property or indexer cannot be assigned to -- it is read only

What im trying to do is transport simple string list over grpc. However i cannot assign value repeated string Role = 16;. Getting me error Property or indexer cannot be assigned to – it is read only

What version of gRPC and what language are you using?

grpc 2.30

What operating system (Linux, Windows,…) and version?

Window

What runtime / compiler are you using (e.g. .NET Core SDK version dotnet --info)

.NET Core SDK (reflecting any global.json): Version: 3.1.302 Commit: 41faccf259

Runtime Environment: OS Name: Windows OS Version: 10.0.19041 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\3.1.302\

Host (useful for support): Version: 3.1.6 Commit: 3acd9b0cd1

.NET Core SDKs installed: 3.1.301 [C:\Program Files\dotnet\sdk] 3.1.302 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

What did you see instead?

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

See TROUBLESHOOTING.md for how to diagnose problems better.

Anything else we should know about your project / environment?

Property or indexer ‘UserModelGRPC.Roles’ cannot be assigned to – it is read only

[michalss]

OK thx understand it now. for others like me where it is how to make it work:

var iUser = new UserModelGRPC();
iUser.Roles.Add(iList<string>)

[JamesNK]

You can’t set the roles collection. You need to add values to the collection.