unity script copy component and use code example

Example 1: unity copy component to other gameobject runtime

public static T GetCopyOf<T>(this Component comp, T other) where T : Component
 {
     Type type = comp.GetType();
     if (type != other.GetType()) return null; // type mis-match
     BindingFlags flags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Default | BindingFlags.DeclaredOnly;
     PropertyInfo[] pinfos = type.GetProperties(flags);
     foreach (var pinfo in pinfos) {
         if (pinfo.CanWrite) {
             try {
                 pinfo.SetValue(comp, pinfo.GetValue(other, null), null);
             }
             catch { } // In case of NotImplementedException being thrown. For some reason specifying that exception didn't seem to catch it, so I didn't catch anything specific.
         }
     }
     FieldInfo[] finfos = type.GetFields(flags);
     foreach (var finfo in finfos) {
         finfo.SetValue(comp, finfo.GetValue(other));
     }
     return comp as T;
 }

Example 2: unity adding component to another gameobject

//referencing a gameobject
public GameObject exampleObject;
//===============================================================>
private Rigidbody rb; //example of a component

public void Awake() {
	// adding a Rigidbody component to exampleObject
	rb = exampleObject.AddComponent<Rigidbody>();
  
	// referencing an existing Rigidbody component in exampleObject
	rb = exampleObject.GetComponent<Rigidbody>();
}