'Bitmap' could not be found (are you missing a using directive or an assembly reference?)

Question

I am getting the following compile-time error:

The type or namespace name 'Bitmap' could not be found (are you missing a using directive or an assembly reference?)

Here is my code:

BitmapImage img = new BitmapImage();

Answer 1

You have to add System.Drawing to your references so in solution Explorer rightclick on References and click on Add References and in assemblies find System.Drawing and click OK

Answer 2

Today (2020 year) it's nuGet package System.Drawing.Common.dll. To add it: right click on project name (at solution explorer) --> "Manage NuGet packages" --> choose "Browse" label at the top --> search for "System.Drawing.Common" --> install it.

Answer 3

Add PresentationCore as a reference.

How-to:

1. Click the .NET tab.
2. Locate and click the PresentationCore item from the list.
3. Click the OK button.

Result:

The PresentationCore assembly appears in the References list for your project.

Finally:

Add a using directive for the System.Windows.Media.Imaging namespace at the top of the file, which is where BitmapImage lives.

using System;
using System.Windows.Media.Imaging;

Answer 4

Perhaps you need to add:

using System.Windows.Media.Imaging;