How to “let” in lambda expression?

Question

How can I rewrite this linq query to Entity on with lambda expression?
I want to use let keyword or an equivalent in my lambda expression.

var r         


        

Answer 1

Another option is to define this extension method:

public static class Functional
{
    public static TResult Pipe(this T value, Func func)
    {
        return func(value);
    }
}    

Then write your query like this:

var results = Stores
    .Where(store => store.Sales.Average(s => s.Price)
        .Pipe(averagePrice => averagePrice < 500 && averagePrice > 250));