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Good day, as you can see in the image, at first May 4 2023 it's show the back color light blue but when I click next button for show other month and back to the present month the back color of UserControl not show.
As you can see the picture below, all of this code is running for my calendar. I don't know where is my mistake.
Please help me to fix this problem.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 11%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHL%3C/text%3E%3C/svg%3E)
Hi,@Jay-R Hayashi. Welcome Microsoft Q&A. What is your project? Is it a wpf project, Asp.Net project or something else?
What is the code for your UserControl's view? Could you show a complete example code that reproduces the problem?
Good day sir Viorel, I try your code sir and we have some error.
Try using month == today.Month instead of wrong =.
Hi,@Jay-R Hayashi. Glad your problem is solved. I'm turning Viorel's solution into an answer. You could accept it as an answer, It's helpful for community members with related questions.
Try adding these lines to your buttons:
DateTime today = DateTime.Today;
if( year == today.Year && month = today.Month && i == today.Day ) ucdays.BackColor = Color.LightSkyBlue;
To avoid code repetition, maybe you should create a common function.