How to convert image to 300 dpi in C#

How do you change the DPI of an image in C#?

Using the Bitmap class, you load the image from the file. Then, use the SetResolution(float xDpi, float yDpi) method to adjust the horizontal and vertical DPI of the image.

For example:

string inputFilePath = "input.jpg";
string outputFilePath = "output_300dpi.jpg";
// c# load the image file
using (Bitmap bitmap = new Bitmap(inputFilePath))
{
     // Set the resolution to 300 DPI
     bitmap.SetResolution(300, 300);
     // Save the image with the new resolution
    bitmap.Save(outputFilePath, ImageFormat.Jpeg);
}

The updated image is saved to a new file, preserving the DPI setting.