Reference to type 'IdentityBuilder' claims it is defined in 'Microsoft.AspNetCore.Identity', but it could not be found

[cowtrix]

Hi all,

Attempting to follow the steps in the quickstart. However, the line:

services.AddIdentityWithMongoStores("mongodb://localhost/myDB");

...throws a syntax error:

Reference to type 'IdentityBuilder' claims it is defined in 'Microsoft.AspNetCore.Identity', but it could not be found

I am referencing Microsoft.AspNetCore.Identity 2.2.0, however when I look within this .dll I cannot find any definition for this IdentityBuilder class. Even more confusingly, when I look at the source for 'Microsoft.AspNetCore.Identity', I can see references to that class within it. What the heck?

[GodCC6]

Hi, Have you solved this problem? I am suffering the same error...

[lud]

Same here.

[emre-bener]

simply updating all packages solved it for me. here are the steps:

• take a backup of the project...
• open "package manager console" in VS via "view > other windows > package manager console"
• run "Update-Package"