DataGridView not updating in c# -

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Anyone know what's going on? Changing code 2 into code 2 can solve the problem - there should not be a theoretical difference. (Theory behaves like a pumpkin killing a brick wall).

Code 1: 

  Output data gray view. Data source = myList;

Code 2: 

  Output Data Grid view. Data source = null; Output Data Grid View Data source = myList;

Take a look at this link

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