Single() vs SingleOrDefault() vs First() vs FirstOrDefault() in LINQ Q

1.	Single() vs SingleOrDefault() vs First() vs FirstOrDefault() in LINQ Query
Answer» Single() vs SingleOrDefault() vs First() vs FirstOrDefault() in LINQ Query Below are the 3 MAIN difference between Single() vs SingleOrDefault() vs First() vs FirstOrDefault() Defination (1)Single():- This will return a single specific ELEMENT froma sequence (2)SingleOrDefault():-This will return the single specific element from sequence or will return default value if that element not found (3)First():-This will return the first element from sequence (4)FirstOrDefault():- This will returns the first element of a sequence or default value if no element is found Exception thrown (1)Single():-It will THROWS error when 0 or more then 1 elements comes in result (2)SingleOrDefault():-It will throws error if more then 1 element in result (3)First():-This will throws error if no elements in the result is return (4)FirstOrDefault():-If source is null then it will throws error When to Use (1)Single():-It will be USED when we EXACTLY have 1 element expected and value is not 0 or more then 1 (2)SingleOrDefault():-When we expect 0 or 1 element then we use it (3)First():-When we expect more then 1 element and we need only first value (4)FirstOrDefault():-When more then 1 element expected and we need only the first element. It is also okay when result is empty

Single() vs SingleOrDefault() vs First() vs FirstOrDefault() in LINQ Query

Answer»

Single() vs SingleOrDefault() vs First() vs FirstOrDefault() in LINQ Query
Below are the 3 MAIN difference between Single() vs SingleOrDefault() vs First() vs FirstOrDefault()

Defination

(1)Single():- This will return a single specific ELEMENT froma sequence
(2)SingleOrDefault():-This will return the single specific element from sequence or will return default value if that element not found
(3)First():-This will return the first element from sequence
(4)FirstOrDefault():- This will returns the first element of a sequence or default value if no element is found

Exception thrown

(1)Single():-It will THROWS error when 0 or more then 1 elements comes in result
(2)SingleOrDefault():-It will throws error if more then 1 element in result
(3)First():-This will throws error if no elements in the result is return
(4)FirstOrDefault():-If source is null then it will throws error

When to Use

(1)Single():-It will be USED when we EXACTLY have 1 element expected and value is not 0 or more then 1
(2)SingleOrDefault():-When we expect 0 or 1 element then we use it
(3)First():-When we expect more then 1 element and we need only first value
(4)FirstOrDefault():-When more then 1 element expected and we need only the first element. It is also okay when result is empty