CAS???????????????????????????????????

I dont think it is CAS. I have encapsulated my code  in a try catch block and it did not throw any exception.

try
{
PartCacheWrite(Shared, "Key", "Value", NoAbsoluteExpiration, System.TimeSpan.FromMinutes(10));
if(PartCacheRead(Shared, "Key") != null)
{
var = (ValueType)PartCacheRead(Shared, "Key");
}
dataGrid.DataSource = var;
dataGrid.DataBind();
}
catch(Exception ex)
{
lblError.Text = ex.Message;
lblError.Visible = true;
}

The if statement always returns  true. if it was CAS an SPException would have been thrown when i tried writing  to the Cache.

Have you tried constructing a timespan? Or using an absoluted expiration? It
may be instantly expiring.

There is no AbsoluteExpiration and SlidingExpiration in PartCacheRead. The code  was not accessible while sending that mail and i wrote from memory. Got confused between the syntax of PartCacheWrite and Page.Cache.Insert

PartCache takes only one TimeSpan parameter at the very end. It is the timeout setting  for writing  the value to cache. No info is available if that also doubles as the Expiration setting.

Anyway I tried constructing a new TimeSpan object  and TimeSpan.FromMinutes, there was no difference.

Do you have the actual code  you’re using? Can you post that?