private void Addbtn_Click(object sender, EventArgs e) { BinarySearchTree.g = panel1.CreateGraphics(); BinarySearchTree.g.Clear(Color.White); BinarySearchTree.RV = 0; BinarySearchTree.Iold = -1; BinarySearchTree.Jold = -1; BinarySearchTree.CurrentHeight = 0; BinarySearchTree.Lcounter = 0; BinarySearchTree.RCounter = 0; BinarySearchTree.Insert(ref BinarySearchTree.root, Convert.ToInt32(ADDTextBox.Text), 0, 0); BinarySearchTree.Draw(panel1, ref BinarySearchTree.root, 0); }