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I am working on a math problem generator and for the current context I'm trying to check if both of the boxes are unchecked, a user can choose 1 or both of the check boxes but I want to display an error stating that at least 1 must be chosen for the type of math to be generated. I know I can check if they are both checked with

if (checkBoxAddSub.Checked && checkBoxMultDiv.Checked)

but I want to see if both of are unchecked, which as far as I know can only be done with checkstate but I'm getting an error with

if (checkBoxAddSub.CheckState == unchecked && checkBoxMultDiv.CheckState == unchecked)

Just looking for clarification.

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The checked method returns a boolean, true if checked false if otherwise. So you can use

if (!checkBoxAddSub.Checked && !checkBoxMultDiv.Checked)

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The checked method returns a boolean, true if checked false if otherwise. So you can use

if (!checkBoxAddSub.Checked && !checkBoxMultDiv.Checked)

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ty, thought i could only do !=

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