PRB: System.ArgumentOutOfRangeException Occurs When slidingExpiration Parameter Exceeds One Year

When you use either the Insert method or the Add method of the Cache class in ASP.NET to perform data caching, you may receive the following error message about the value of the slidingExpiration parameter:

This error occurs because the slidingExpiration input parameter is less than TimeSpan.Zero or greater than one year when you call either the Cache.Insert method or the Cache.Add method. This range is set within the Cache class itself. If the TimeSpan object's value for the associated slidingExpiration parameter is not within this range, ASP.NET throws an exception of type ArgumentOutOfRangeException.

To reproduce this problem, use the Insert method as follows: In the preceding code, the Days input parameter of the constructor for the TimeSpan class is set to 366, which is greater than one year (365 days).

For additional information, click the article number below to view the article in the Microsoft Knowledge Base: For more information on data caching in ASP.NET, refer to the following Microsoft Web sites: For more information about the Cache class and its related methods, refer to the following topics in the Microsoft .NET Framework Class Library: