Description: The ‘Lifetime’ in C# refers to the duration during which an object exists in memory. This concept is fundamental in memory management and the lifecycle of objects in object-oriented programming. In C#, objects can have different lifetimes depending on how and where they are created. For example, objects created on the heap have a lifetime that extends until the garbage collector decides to free the memory, while objects created on the stack have a shorter lifetime, limited to the scope of the function in which they were created. Understanding lifetime is crucial to avoid memory leaks and ensure that resources are managed efficiently. Additionally, the lifetime of an object can influence the performance of an application, as inefficient memory handling can lead to excessive resource usage and decreased execution speed. Therefore, developers must be aware of how the lifetime of objects affects both the functionality and efficiency of their applications.