### Type of issue Missing information ### Description These concepts are important for developers to use the latest improvements in C#, where mutability and readonly are easier to implement than before. ### Page URL https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/types/ ### Content source URL https://github.com/dotnet/docs/blob/main/docs/csharp/fundamentals/types/index.md ### Document Version Independent Id 9aa4f01b-a5a0-3cb1-3c22-db333c0d9f11 ### Article author @BillWagner ### Metadata * ID: 1991c89a-9728-ea31-a999-79b3cb331372 * Service: **dotnet-csharp** * Sub-service: **fundamentals**