Not able to define an string ID

[hoangductranit]

I tried defining an ID for my entity, where the ID is stored in the database as CHAR(50), using the following code:

public readonly partial record struct CRM_BS_ROLE_ID(string Value) : IStructId<string>;

However, it’s throwing an error
The type 'string' must be a non-nullable value type in order to use it as parameter 'TValue' in the generic type or method 'IStructId'