What are benefits and Limitation of using Viewstate for state management?

Following are the benefits of using Viewstate :-

ã No server resources are required because state is in a structure in the page code.
ã Simplicity.
ã States are retained automatically.
ã The values in view state are hashed, compressed, and encoded, thus representing a higher state of security than hidden fields.
ã View state is good for caching data in Web frame configurations because the data is cached on the client.

Following are limitation of using Viewstate:-

ã Page loading and posting performance decreases when large values are stored because view state is stored in the page.
ã Although view state stores data in a hashed format, it can still be tampered because it is stored in a hidden field on the page. The information in the hidden field can also be seen if the page output source is viewed directly, creating a potential security risk.

Below is sample of storing values in view state.

this.ViewState["EnterTime"] = DateTime.Now.ToString();