c# design time serialization

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C#3.0

C#

I'm trying to add a string to the Property Grid at design time but can't figure out why it isn't working.

[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[Category("Design Time")]
[Description("Question to be Asked")]
[Browsable(true)]
public string Question { get; set };


I want to be able to see "Question" on the property grid, so that I can write text and have it serialized at design time.

What am I doing wrong?