Add<T>

public static Binding Add<T>(this ControlBindingsCollection bindingCollection, string property, object datasource, Expression<Func<T, object>> expression)
{
    string relatedNameChain = "";
    if (expression.Body is UnaryExpression)
        relatedNameChain = ((expression.Body as UnaryExpression).Operand as MemberExpression).ToString();
    else if (expression.Body is MemberExpression)
        relatedNameChain = (expression.Body as MemberExpression).ToString();

    string skippedName = String.Join(".", relatedNameChain.Split(new char[] { '.' }).Skip(1).ToArray());
    return bindingCollection.Add(property, datasource, skippedName);
}

var txtName = new System.Windows.Forms.TextBox();
var ds = new System.Windows.Forms.BindingSource();
txtName.DataBindings.Add<tblProduct>("Text", ds, p => p.ProductName, true, DataSourceUpdateMode.OnValidation, "");