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Editorial Team
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Asked: 2026-05-14T09:03:13+00:00

I am building a WinForms application with a few custom business objects. I bind

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I am building a WinForms application with a few custom business objects. I bind a List of a single type of object to a DataGridView with BindingList and implement IEditableObject on my object, but when I attempt to edit the values in the DataGridView I get the following exception:

The following exception occurred in the DataGridView:

System.NotImplementedException: The method or operation is not implemented.
– at System.ComponentModel.ReflectPropertyDescriptor.SetValue(Object component,Object value)
– at System.Windows.Forms.DataGridView.DataGridViewDataConnection.PushValue(Int32 boundColumnIndex, Int32 columnIndex, Int32 rowIndex, Object value)

To replace this default dialog, please handle the DataError event.

I’m sure I’m missing something, but I don’t know what it is…

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1 Answer

  1. Editorial Team

    Well, apparently I’m not very observant…

    The problem was that ReSharper implemented my properties with NotImplementedException, so when I edited that property through the DataGridView, it threw that Exception.

    Thanks, sorry to waste your (and my!) time.

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