Some constructors of the ArgumentException, ArgumentNullException, ArgumentOutOfRangeException and DuplicateWaitObjectException classes must be fed with a valid parameter name. This rule raises an issue in two cases:

Noncompliant Code Example

public void Foo(Bar a, int[] b)
{
  throw new ArgumentException(); // Noncompliant
  throw new ArgumentException("My error message", "c"); // Noncompliant
  throw new ArgumentException("My error message", "c", innerException); // Noncompliant
  throw new ArgumentNullException("c"); // Noncompliant
  throw new ArgumentNullException("My error message", "c"); // Noncompliant
  throw new ArgumentOutOfRangeException("c");
  throw new ArgumentOutOfRangeException("c", "My error message"); // Noncompliant
  throw new ArgumentOutOfRangeException("c", b, "My error message"); // Noncompliant
  throw new DuplicateWaitObjectException("c", "My error message");  // Noncompliant
}

Compliant Solution

public void Foo(Bar a, Bar b)
{
  throw new ArgumentException("My error message", "a");
  throw new ArgumentException("My error message", "b", innerException);
  throw new ArgumentNullException("a");
  throw new ArgumentNullException(nameof(a));
  throw new ArgumentNullException("a", "My error message");
  throw new ArgumentOutOfRangeException("b");
  throw new ArgumentOutOfRangeException("b", "My error message");
  throw new ArgumentOutOfRangeException("b", b, "My error message");
  throw new DuplicateWaitObjectException("b", "My error message");
}

Exceptions

The rule won’t raise an issue if the parameter name is not a constant value (inline declaration, nameof() or const variable).