Help need in implementing logic

Hi,

I am very new to C# programming. I am creating GUI in windows from application.I want to estimate the incoming quantity based on three properties. I am able to get those properties. User can use any one of the property or all three properties to estimate the incoming quantity. The three properties are
1) Temperature
2) Pressure
3) Density
So i have created check box's for each property. when i tick the check box then i am going to use that property to estimate incoming property.
I have the conditions like this
1) Temperature is "30" to "60" and pressure is "100 to 300" and density "0 to 0.4" then it is "gas".
2) Temperature is "60" to "90" and pressure is "300 to 600" and density "0.4 to 1.4" then it is "liquid".
3) Temperature is "90" to "120" and pressure is "600 to 900" and density "1.4 to 3" then it is "water".

But the thing is user can use any one of the property or all above three properties to estimate. for example if user use only temperature then i need to use that property and based on that i have to estimate. if user wants to use all "temp, press, density" then i need to use all properties and if all is true then display the incoming quantity.

I have tried to upload my windows form images but i am not able to upload on this site. i don't know how to upload. so help me how to implement this concept.

Tags: C# (C# 4.0), Windows Forms