You have an Azure Cosmos DB for NoSQL account named account1. You need to create a container named Container1 in account1 by using the Azure Cosmos DB .NET SDK. The solution must ensure that the…

`TimeToLivePropertyPath` defines a property within an item that contains its TTL value, it does not disable TTL for the entire container when set to `null`.

Setting `TimeToLivePropertyPath` to `0` is an invalid value for a property path and would not disable container-level TTL.

Setting the `DefaultTimeToLive` property to `null` for a container explicitly disables the Time-to-Live (TTL) feature for that container. This ensures that items will never expire by default, fulfilling the requirement for all items in the container.

Setting `DefaultTimeToLive` to `-1` enables TTL but sets a default of "never expire"; however, an item-level TTL could still override this. Setting to `null` truly disables TTL at the container level, preventing any expiration.