If I have two user controls on a page and they both save a value to

HttpRuntime.Cache["MyDate"]

Will they be overwriting each others values?

This question always confuses me. 

kjmcad:

If I have two user controls on a page and they both save a value to

HttpRuntime.Cache["MyDate"]

Will they be overwriting each others values?

 

This question always confuses me. 

Yes.  There is a single Cache - so those controls would overwrite each others values

Just remember the ASP.NET session is unique per user, whereas the ASP.NET cache is available to all users.

 Hi kjmcad,

Caching means temporary storage of data in memory that is highly-demanding and frequently used in order to accelerate performance and for quick access to various essential information.

And, the Cache object is based on the all users in the application.

So from your question, the answer is that the last Cache item will overwrite the last one by the same item name.

If you want to share the data by the single user, you can use the Session object.

By the way, I recommend you study all states in the ASP.NET.

Nine Options for Managing Persistent User State in Your ASP.NET Application
http://msdn.microsoft.com/en-us/magazine/cc300437.aspx

All States in ASP.NET
http://forums.asp.net/p/1392899/2986337.aspx#2986337

Let me know whether that answers your question, or if I've missed something.

if you want to store anything in cache object  then you can store in no of pages

its like a session object only difference is that  session variable store per user basis

but cache variable object store every user value.

Thanks