Is There a Limit to the Number of Threads I Can Create in a .NET Application?

Limitations of thread creation in .NET applications

You may be wondering about the maximum number of threads that can be created in a C# application. The answer is simple: there are no inherent limitations.

The maximum number of threads ultimately depends on available physical resources. As Raymond Chen explains in an insightful article, the number of thread contexts a system can support is related to the number of logical processors, available memory, and system resources.

While an exception will not be thrown directly when a resource limit is reached, the system may start to behave unexpectedly or even fail. If you find yourself needing to ask what the maximum number of threads is, Raymond Chen aptly suggests that you may be approaching your programming problem in an unconventional way.

However, it is worth noting the default number of threads in the .NET thread pool:

• Framework 4.0 (32-bit): 1023
• Framework 4.0 (64-bit): 32767
• Framework 3.5: 250 per core
• Framework 2.0: 25 per core

These numbers may vary based on hardware and operating system configuration. Generally speaking, thread creation is a resource-intensive process, and it is crucial to use threads wisely to avoid overloading the system.

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