define lambda delegate
Func and Action Delegates take the C# language to a new functional programming level. Lambda Expressions are tightly entwined in the LINQ infrastructure. We take a brief look at each. Lambda Expressions. A lambda expression is an unnamed method that you write in place of a delegate instance. The compiler immediately converts the lambda expression to either: â¢ A delegate instance. â¢ An expression tree, of type Expression<TDelegate>, representing the code inside the lambda expression in a traversable object model.