.net6 & MoreLinq : Call is ambiguous between System.Linq.Enumerable.DistinctBy and MoreLinq.MoreEnumerable.DistinctBy

Recently I upgraded one of my projects to use .NET 6. Earlier I was using MoreLinq library to use DistinctBy() to apply it on the specific property.

Now as I upgraded TargetFramework to .NET 6, this change come up with inbuilt support to DistinctBy().

Now the compiler is confused about which DistinctBy() needs to select, I can’t rely on System.Linq, because the removal of using MoreLinq will cause multiple other errors.

I know if we face ambiguity between the same methods then we can use using alias, but I am not sure how to use using alias for Linq extension methods.

Here is the error:

I am able to replicate the same issue in the below fiddle

Try online

>Solution :

You can’t alias an extension method, but you can call the extension like a normal method, using the full namespace. After all, extension methods are really just syntactic sugar. For example (using the same data you provided in your fiddle):

var inputs =  new []
{
    new {Name = "Bruce wayne", State = "New York"},
    new {Name = "Rajnikant", State = "Tamil Nadu"},
    new {Name = "Robert Downey jr", State = "Pennsylvania"},
    new {Name = "Dwane Johnson", State = "Pennsylvania"},
    new {Name = "Hritik", State = "Maharashtra"}
};
    
var net6DistinctBy = System.Linq.Enumerable.DistinctBy(inputs, x => x.State);
var moreLinqDistinctBy = MoreLinq.MoreEnumerable.DistinctBy(inputs, x => x.State);