System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.ThrowHelper.ThrowKeyNotFoundException() at System.Collections.Generic.Dictionary`2.get_Item(TKey key) at MVCLogicB2B.Controllers.CategoryController.ProductDetail(String I, String SearchBy, String SearchKeyword, String pos) in E:\Guri\Web\VS2013_Projects\MVCLogicB2B\MVCLogicB2B\Controllers\CategoryController.cs:line 2914