How can developers identify and resolve database connection pool exhaustion in an ASP.NET Core application?

Connection pool exhaustion can cause slow requests, timeouts, and eventually widespread application failures. Developers should understand how connection pools work and how issues such as undisposed connections, long-running queries, excessive concurrency, or incorrect lifetime management can consume available connections. Explore application metrics, database monitoring, logging, and code-level investigation techniques for identifying the root cause. This is an important production troubleshooting skill for ASP.NET Core and .NET developers.