C# - Classes are not showing C#

I am working on a project.  In the ViewModels I have 3 classes.  One of them displays C# and the other two display a yellow triangle in the bottom right corner.  

I don't see any issues while running the app.  

Any idea why it is not displaying C#?  Is this an issue?
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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
the another 2 classes with yellow triangle in the bottom right corner could have been deleted or got some issues.

try refresh the project explorer and then mouse over to these 2 items to see what message you getting here?

also check the Error List if you can find something there?
CipherISAuthor Commented:
Don't see refresh.

No errors in error list.

The code does work.
CipherISAuthor Commented:
Here is an example of a class that is NOT showing the C#.

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using App.Models;

namespace App.Helper
    public class GeoLocatorPosition

        private static Task<LongLatModel> longlatModel { get; set; }

        public Task<LongLatModel> GetGeoPosition()
            return longlatModel;


Open in new window

There isn't anything in the class.
Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
what do you mean by "an example of a class that is NOT showing the C#" ?

the issue mentioned in your question (yellow triangle) may not really related to codes

No errors in error list.
what about Warnings in Error List?

there are some suggestions in this discussion, see whether it's helpful:

VS 2017 15.3 Yellow Triangles on References

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CipherISAuthor Commented:
I also have this issue in 2017.  I reinstalled it and added some components and that seemed to have resolved it.
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