lambda expressions in immediate window for VS2015

c# linq lambda visual-studio-2015 immediate-window
Stenkross picture Stenkross · Apr 11, 2016 · Viewed 8.5k times · Source

I am running Visual Studio 2015, where people claim that lambda expressions are supported in immediate window, watch and other places. But that does not work for me. I created a new console application with the following code: 

static void Main(string[] args)
{
    var list = new List<int> {1, 2, 3, 4, 5, 6, 7};
}

And then tried some simple lambdas in immediate window and watch as can be seen here: enter image description here

And as you can see, it gives me "Expression cannot contain lambda expressions". I've looked in tools -> options -> debug settings but could not find anything related to the issue. The version I am running is VS2015 Enterprise, 14.0.24720.00 Update 1 What could be causing this issue?

Answer

Tom picture Tom · Apr 11, 2016

This definitely works for me, looks like when I tick either Use Managed Compatibility Mode or Use the legacy C# and VB expression evaluators it stops working. Ensure those are unchecked.

enter image description here

Related questions

Join/Where with LINQ and Lambda

I'm having trouble with a query written in LINQ and Lambda. So far, I'm getting a lot of errors here's my code: int id = 1; var query = database.Posts.Join(database.Post_Metas, post => database.Posts.Where(x => x.…

Read More
Sorting a list using Lambda/Linq to objects

I have the name of the "sort by property" in a string. I will need to use Lambda/Linq to sort the list of objects. Ex: public class Employee { public string FirstName {set; get;} public string LastName {set; get;} public …

Read More
LINQ: "contains" and a Lambda query

I have a List<BuildingStatus> called buildingStatus. I'd like to check whether it contains a status whose char code (returned by GetCharCode()) equals some variable, v.Status. Is there some way of doing this, along the lines of …

Read More