c# - Global class variable for ASP.NET -

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i building asp.net application has 2 projects. 1 class library having bl code. want create public class instance variable 1 of classes in bl. class instance variable avoid loading data on each request makes application respond slow each request. how make global class variable load data @ page_load, , keep until user redirects page.

create in viewstate , wrap in property easy of use. along lines of: 

public myclass myobj {     {         if (viewstate["myobj"] == null){              viewstate["myobj"] = new myclass();         }         return viewstate["myobj"];      }     set {         viewstate["myobj"] = value;     } }

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