c# - Missing method 'instance class [mscorlib]System.Collections.Generic.IEnumerable`1 -

i've not have nuget package installed. however, i'm getting error below:

error   2    error: missing method 'instance class [mscorlib]system.collections.generic.ienumerable`1<class nuget.visualstudio.ivspackagemetadata> [xamarin.testcloud.integration] nuget.visualstudio.ivspackageinstallerservices::getinstalledpackages(class [envdte]envdte.project)' class 'nuget.visualstudio.vspackageinstallerservices'.       0   0 

also, i'm surprised here because showing build successful, still showing above under error list.

i've cross checked if have installed nuget package. , i'm not able find any.

anybody please give me suggestion on this.

i had similar problem went away after updated nuget through visual studio menu

tools > extrensions , updates... > click on updates

from there saw nuget had update available. run update , restart visual studio.