Examples of errors detected by the V3161 diagnostic

V3161. Comparing value type variables with 'ReferenceEquals' is incorrect because compared values will be boxed.

.NET 9

V3161 Comparing value type variables with 'ReferenceEquals' is incorrect because 'this' will be boxed. ILImporter.StackValue.cs 164

struct StackValue
{
  ....
  public override bool Equals(object obj)
  {
    if (Object.ReferenceEquals(this, obj))
      return true;

    if (!(obj is StackValue))
      return false;

    var value = (StackValue)obj;
    return    this.Kind == value.Kind
           && this.Flags == value.Flags
           && this.Type == value.Type;
  }
}

Radarr

V3161 Comparing value type variables with 'ReferenceEquals' is incorrect because 'other' will be boxed. OsPath.cs 379

public bool Equals(OsPath other, bool ignoreTrailingSlash)
{
  if (ReferenceEquals(other, null))
  {
    return false;
  }
  ....
}