[C#] How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
Applications can be developed in two different mode.
The first one is to declare our application to be non-DPI-aware (not declaring anything will default to this). In this case the operating system will render our application under the expected 96 DPI and then will do to the bitmap scaling that we discussed before. The result will be a blurry looking application, but with a correct layout.
The second option is to declare the application as DPI-aware. In this case the OS will not do any scaling and will let your application render according to the original DPI of the screen. In case of a per-monitor-DPI environment, your application will be rendered with the highest DPI of all the screens, then this bitmap will be scaled down to the proper size for each monitor. Downscaling results in a better viewing experience than upscaling but you might still notice some fuzziness.
If you want to avoid that, you must declare your application as per-monitor-DPI-aware. Then you must detect when your application is dragged across different monitors and render according to the DPI of the current one.
Declaring the DPI awareness is done in a manifest file.
refer the following link stackoverflow
I've created a simple Winforms application in C#. When I run the application on a machine with high DPI settings (e.g. 150%), the application gets scaled up. So far so good! But instead of rendering the fonts with a higher font size, all texts are just scaled up, too. That of course leads to very blurry text (on all controls like buttons etc.).
Shouldn't windows take care of rendering the texts correctly? For example my application's title bar is rendered crisp & clear.
Windows Forms App ugly fonts (blurry) on larger DPI?
Select your Form, go to Properties and change AutoScaleMode property from Font to Dpi.
For more information in regards to scaling in Windows Forms, refer to MSDN article Automatic Scaling in Windows Forms.
First half explains the background behind the need of scaling and explains some of the legacy constructs. Scroll down about half-way to Current Support for Automatic Scaling (or click this link).