Question from the C# Winforms test

ddlCategory.DataSource = dsCategory;

ddlCategory.DisplayMember = "CategoryName";

ddlCategory.ValueMember = "CategoryID";

ddlCategory.DataSource = dsCategory.Tables[0];

ddlCategory.DisplayMember = "CategoryName";

ddlCategory.ValueMember = "CategoryID";

ddlCategory.DataBindings.Add("DisplayMember", dsCategory, "CategoryName");

ddlCategory.DataBindings.Add("ValueMember", dsCategory, "CategoryID");

ddlCategory.DataBindings.Add("DisplayMember", dsCategory.Tables[0], "CategoryName");

ddlCategory.DataBindings.Add("ValueMember", dsCategory.Tables[0], "CategoryID");