c# - The codebehind of aspx page is not under the page hierarchy -

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when try drag , drop specific asp.net page project , notice code behind n't under page hierarchy in visual studio !

enter image description here

estimatedbalance.cs not under .aspx

note:

i drag 3 files :

  1. estimatedbalance.aspx
  2. estimatedbalance.aspx.designer.cs
  3. estimatedbalance.cs

how fix problem ?

the page highlighted class, not codebehind. codebehind should estimatedbalance.aspx.cs, not estimatedbalance.cs


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