Yes you can..
Copy the form design first: say
Form1.cs[Design]
to another form. say
Form2.cs[Design]
then copy all the form1 code to form2 code;
i.e
Form1.cs
to
Form2.cs
Do these things after that:
In the code for form 2, change this to
public partial class Form1 : Form
{
public Form1()
{
public partial class Form2 : Form
{
public Form2()
{
If the controls in form2 have to be same as in form1, then you don't need to change anything else.
Look for any controls that could get missing. Just remove them from resources.