Here Mudassar Ahmed Khan has explained with an example, how to display TextBox when CheckBox is checked in ASP.Net using C# and VB.Net.
The CheckBox will be assigned OnCheckChanged event handler and when the CheckBox is checked (selected), the TextBox will be displayed and when the CheckBox is unchecked (unselected) the TextBox will be hidden in ASP.Net using C# and VB.Net.
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