circular references in dotnet framework

Occurs due to referencing two projects between themselves. Add a new project and come out of that situation.

Circular References:
A circular reference occurs when two or more components reference each other directly or indirectly, creating a loop. 

Suppose Project A references Project B, at the same time, Project B also references Project A. This creates a circular reference.
The .NET build system (MSBuild) can not resolve the order in which projects should be built. It results in build errors like: error CS0016: Circular dependency detected

How to avoid?

• Refactor your code to remove circular dependencies.
• Extract common code into a third project (like a shared library), and have both projects reference this instead.
• Use interfaces or abstractions to break direct dependency.