xUnit1000 v2 v3 Error

Test classes must be public

Cause

A class containing test methods is not public.

xUnit.net will not run the test methods in a class if the class is not public.

To fix a violation of this rule, make the test class public.

using Xunit;

class xUnit1000
{
    [Fact]
    public void TestMethod()
    { }
}

using Xunit;

public class xUnit1000
{
    [Fact]
    public void TestMethod()
    { }
}