how conanical function map in linq scenarios.

hi,

   i could not get these lines if u have any example please send me following lines are from this link "https://msdn.microsoft.com/en-us/library/bb738626(v=vs.100).aspx"

"For LINQ scenarios, queries against the Entity Framework involve mapping CLR methods to methods in the underlying data source. The CLR methods map to canonical functions so that a specific set of methods will correctly map, regardless of the data source."

and

https://msdn.microsoft.com/en-us/library/bb386964(v=vs.100).aspx

"LINQ operators are not defined by a class, but rather are
methods on a class."

yours sincerely