C#: Differences between Singleton and Static Pattern

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Difference between static class and singleton pattern?

I'm thinking about the choice between Static classes and Singleton pattern on C#.

Do you know how static classes are created? In particular, I would know if a static class is unique during program execution and what are pro or cons against Singleton pattern.

Thank you in advance.

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A static class can not be instanciated. A singleton can be instanciated once.

Discussion about the use of the Singleton pattern

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