Check if string equals another string plus a number

[WeekSky]

I imagine this would be pretty simple, but I'm not sure how to do it.

I want to check whether the string "fileName" equals the text in a textBox, but if the text in the textbox is that string plus any number, I want the check to be positive as well.

if (fileName == textBox1.Text || fileName == textBox1.Text + (any number))

How could I do this?

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