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How To Get Text From Binded TextBlock Store App c#

I want to get text from below TextBlock but i can't get it ?? Note : fname is property for setting text in TextBlock

 <TextBlock Name="getname" Text="{Binding Path=fname }"/>

By default, the text binding for a TextBlock is One-Way. You'll need to explicitly specify a Two-Way binding if you want to read the value back into your view model.

Text="{Binding Path=fname, Mode=TwoWay}"

If you're not using view models and you just want programmatic access to the text value you'll need to access the value in code-behind.

public string GetTextBlockText()
{
    return this.getname.Text;
}

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