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Sardar Mudassar Ali Khan
Sardar Mudassar Ali Khan

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What is Circular Dependency in Microsoft Core Web API

When two or more components in your application are dependent on each other either directly or indirectly, ASP.NET Core Web API refers to this as a circular dependency. This results in a cycle of dependencies. When two classes or components share references, it might result in a circular chain of dependencies.

Circular dependencies can cause several problems, including:

Compilation errors:

A circular dependency causes the compiler to be unable to resolve the references, leading to compilation failures.

Runtime errors:

Circular dependencies can result in runtime issues like stack overflows and infinite loops even if the code correctly compiles, which will make your application unstable or unusable.

Code maintenance difficulties:

Circular dependencies make it more challenging to comprehend and manage the source. It becomes difficult to pinpoint the cause of problems, and altering one component accidentally can have unintended effects on other components.

To avoid circular dependencies in your ASP.NET Core Web API application, it is important to follow good architectural practices and design principles. Here are some tips to help you prevent circular dependencies:

Dependency Inversion Principle (DIP):

Utilize the Dependency Inversion Principle, which contends that high-level modules ought to rely on abstractions rather than low-level modules directly. By reducing the likelihood of circular dependencies, this notion aids in the decoupling of components.

Dependency Injection (DI):

Component dependencies can be managed with dependency injection. You can prevent tight coupling and circular dependencies by injecting dependencies into a class rather than explicitly constructing them.


Divide your application into more manageable, modular parts. Each component should have a distinct role to play and shouldn't rely on other unrelated components. This lessens the possibility of circular dependencies.

Analyze and refactor:

Check your codebase for circular dependencies on a regular basis. Use programs or IDE plugins that can assist you in automatically identifying circular dependencies. Refactor your code to stop the cycle when you find a circular dependency. This could entail removing interfaces, adding intermediary layers, or reevaluating the architecture.

You can reduce the incidence of circular dependencies in your ASP.NET Core Web API application by putting these strategies into practice and upholding a distinct separation of concerns, leading to a more robust and manageable codebase.

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