Checking if spatial references of two layers are same using ArcObjects?

Question

I have two layers . Now I want to say that the spatial references of these layers are same or not ..

I am using .Net technologies in arcmap.

I have successfully got spatial reference information from layers and now I want to compare these spatial references ..

Example

sp1 , sp2

if(sp1 == sp2)

       give message to user that spatial references are same;

else

     give message to user that spatial references are  not same;

How do I know if these spatial references are same?

Answer 1

public static bool CompareSpatialRefs(ISpatialReference sourceSR, ISpatialReference targetSR)
        {
            IClone sClone = sourceSR as IClone;
            IClone tClone = targetSR as IClone;

            // first level test compares the coordinate system component  
            if (!sClone.IsEqual(tClone))
                return false;

            return true;
        }