Problems with passing data between forms in C#

I have this problem where i couldn't seem to be able to pass any of the data from my current Windows form to the next Windows form. The next form initializes between my previous would just disappear with the values that i wanted to pass to the next form. Please help me on how to pass these values. I would like to retrieve them back when i move backward from my current form to the previous form as well. Thanks again =CmLaM=