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Visual Studio
A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.
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![](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(220.8, 62%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDX%3C/text%3E%3C/svg%3E)
Sometimes it helps if all of the tabs (designers, code) are closed, then Visual Studio is closed and restarted. In addition, install the recent update: 17.13.3. (Use “Check for Updates” from HELP menu). Then load the solution and open the form. If this does not help, then show some details.