xUnit1001 Error

Fact methods cannot have parameters

Cause

A fact method has one or more parameters.

A fact method is a non-parameterized test. xUnit.net will raise a runtime error if it sees a fact method with a non-empty parameter list.

To fix a violation of this rule, remove the parameters from the fact method. Alternatively, change the [Fact] attribute to [Theory].

using Xunit;

public class xUnit1001
{
    [Fact]
    public void TestMethod(int _)
    { }
}

using Xunit;

public class xUnit1001
{
    [Fact]
    public void TestMethod()
    { }
}

using Xunit;

public class xUnit1001
{
    [Theory]
    public void TestMethod(int _)
    { }
}