Part 7: What is difference between Single and SingleOrDefault ?

Single - It returns a single specific element from a collection of elements if element match found. An exception is thrown, if none or more than one match found for that element in the collection.
SingleOrDefault - It returns a single specific element from a collection of elements if element match found. An exception is thrown, if more than one match found for that element in the collection. A default value is
returned, if no match is found for that element in the collection.
Key Points
Single method retrieves a specific element from a collection and throws an exception if no matches or multiple matches exist.
SingleOrDefault method retrieves a specific element and returns a default value when no matches are found, but throws an exception for multiple matches.
Both methods are utilized in LINQ to handle queries on collections effectively.
The choice between Single and SingleOrDefault depends on whether a default return value is preferred for no matches.
Single guarantees that exactly one element is expected in the result, making it useful in strict scenarios.
SingleOrDefault provides more flexibility since it can handle cases with no matches gracefully without exceptions.
Understanding these methods is essential for LINQ interviews, especially for roles involving programming logic and data queries.
What are the differences between Single, SingleOrDefault, and other LINQ methods?
How can exceptions be effectively managed when using LINQ methods?
When should developers choose SingleOverSingleOrDefault in a project?
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