❔ Pattern matching on multiple cases with the same-typed members

public void Foo(Bar bar) {
  if (bar is Bar1 { Prop1: var p1 }) {
    // do stuff with p1
  } else if (bar is Bar2 { Prop2: var p2}) {
    // do the exact same stuff with p2
  } 
  // etc
}

if (bar is Bar1 { Prop1: var p } or Bar2 { Prop2: p } or ...) { 
  // do stuff with p 
}

TypeOfProp p = null;
if (bar is Bar1 { Prop1: p } or Bar2 { Prop2: p } or ...) { 
  // do stuff with p 
}