How can i remove/delete digits in the beginning of a string ?

The problem is that in tn.Text the string start with a number and a dot/point for example:



1. hello

2. hi

3. world



And i need that tn.Text will contain only the text for example:



hello

hi

world

private void FindRecursive(TreeNode treeNode)
            {
                foreach (TreeNode tn in treeNode.Nodes)
                {
                    if (tn.Text == this.txtNodeTextSearch.Text)
                        tn.BackColor = Color.Yellow;
    
                    FindRecursive(tn);
                }
            }