[Solved] overriding ToString() method, behaves strange with Binding

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<DataGridTextColumn Header="Name" Binding="{Binding Path=Name,Mode=TwoWay}" />

DataGridTextColumn takes a CellContent instance and calls ToString() to display it. It displays Value, but without .Value in the path edits in datagrid cells are not applied.

<DataTrigger Binding="{Binding IsTrend}" Value="True" >

DataTrigger takes a CellContent instance and calls Equals() with parameter "True". But CellContent object is not equal to "True".

if I override Equals, DataTrigger works

public override bool Equals(object obj)
{
    return Value.ToString() == (string) obj;
}

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solved overriding ToString() method, behaves strange with Binding