The pursuit of a C# developer, much like any significant expedition, requires a comprehensive understanding of the terrain, the potential obstacles, and the proper tools for navigation. The landscape of hiring a developer is dotted with numerous unanticipated complexities that can easily derail the uninited. To assist in this journey, the following eight insights, gleaned from trial and error, will hopefully illuminate the path ahead.

Firstly, the most apposite place to begin is the C# language itself. Originating from Microsoft as part of the .NET initiative in 2000, it has become a cornerstone of web and desktop application programming. Its synergy with the .NET Framework and robustness in handling complex tasks make it a preferred choice for a wide range of software development scenarios. Thus, the proficiency of a C# Developer in not just the language but also its ecosystem is crucial.

Secondly, while the technical proficiency is undeniably important, the developer's problem-solving skills are of equal import. These skills are emblematic of their ability to translate business requirements into efficient and maintainable code. This ability to perceive the architectural big picture while meticulously crafting its minutiae is, arguably, the differentia specifica of a high-caliber C# developer.

The third point involves understanding their proficiency level with .NET Framework and .NET Core. The .NET Framework, with its extensive class library, is the base for form-based applications and web-based services. On the other hand, .NET Core is a cross-platform successor of .NET Framework and is used for server-side web application development. The trade-off between these two technologies depends on the specific needs of your project and the platform you target.

Fourthly, familiarize yourself with the concept of Object-Relational Mapping (ORM). The Entity Framework, a popular ORM for C#, abstracts the database level details and provides an object-oriented way to manipulate data. A C# developer with extensive knowledge of this framework can significantly expedite the development process.

Fifthly, remember that in the realm of software development, experience often trumps raw knowledge. Evaluate their experience in relevant domains or with similar projects. This will deliver insights into their competence in applying the theoretical knowledge into practical solutions.

The sixth consideration lies in the realm of contemporary practices such as Agile methodologies and DevOps. Familiarity with these practices can accelerate the software development cycle and enhance the quality of the end product.

Seventh, it's important to understand that while individual skills are important, a developer’s ability to work in a team is vital. Programming is often a collaborative task, and thus, team compatibility should be a significant factor in your decision-making process.

Finally, understand that hiring is not the culmination of your journey. The IT world is a rapidly evolving landscape. It is imperative to create an environment of continuous learning and skill upgrade for your C# developer to ensure they stay competent and updated.

Drawing from the wisdom of Sun Tzu's Art of War, "Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win". Similarly, understanding these nuances about C# developers before setting out to hire one will significantly increase your chances of making the right choice, saving both time and resources. Remember, the objective is not to find the best developer in the world, but the right one for your specific needs.