how to check a colliders tag?

I’m trying to check a colliders tag but I keep getting this error:

error CS1061: ‘Collision’ does not contain a definition for ‘Tag’ and no accessible extension method ‘Tag’ accepting a first argument of type ‘Collision’ could be found (are you missing a using directive or an assembly reference?)

here’s the code

 void OnCollisionStay(Collision other) {
      if (other.Tag == "Ground")
      {
       isGrounded = true;
      }  }

void OnCollisionStay(Collision other)
{
if (other.gameObject.CompareTag(“Ground”))
{
isGrounded = true;
}
}

It should be lower case I believe. Also you need to add gameObject before. Like this:
"if (other.gameObject.tag == “Ground”)