Why is this an issue?

Adding params to a method override has no effect. The compiler accepts it, but the callers won’t be able to benefit from the added modifier.

Noncompliant code example

class Base
{
  public virtual void Method(int[] numbers)
  {
    ...
  }
}
class Derived : Base
{
  public override void Method(params int[] numbers) // Noncompliant, method can't be called with params syntax.
  {
    ...
  }
}

Compliant solution

class Base
{
  public virtual void Method(int[] numbers)
  {
    ...
  }
}
class Derived : Base
{
  public override void Method(int[] numbers)
  {
    ...
  }
}

Resources

Documentation

• params keyword