1

Suddenly problem with lambda in foreach statement.

    Current.Nodes.ForEach( n => Debug.Log( n.name ) );// Outputs node0, node1
    foreach( Node node in Current.Nodes )
    {
        Node local_node = node;
        Button button = Instantiate( Resources.Load<Button>( "Prefabs/Button" ) );
        button.transform.SetParent( content );
        button.GetComponentInChildren<Text>().text = node.name;
        button.onClick.AddListener( () =>
        {
            Debug.Log( local_node.name );
        } );
    }

Clicking on buttons always prints node1

2

This is likely an issue with a closure around the local_node variable. Try copying the name of the node into a temporary local variable:

Current.Nodes.ForEach( n => Debug.Log( n.name ) );// Outputs node0, node1
     foreach( Node node in Current.Nodes )
     {
         string nodeName = node.name;
         Button button = Instantiate( Resources.Load<Button>( "Prefabs/Button" ) );
         button.transform.SetParent( content );
         button.GetComponentInChildren<Text>().text = nodeName ;
         button.onClick.AddListener( () =>
         {
             Debug.Log( nodeName  );
         } );
     }
3

Everything because of this code is in couroutine. Here is the answer
http://answers.unity3d.com/answers/974195/view.html