I have created an assembly, which contains two class (Cls1,cls2), in which 
Cls1 contains 3 properties Prop1, Prop2,Prop3 and Cls2 contains some other 
properties.
Now i am using this assembly (Add reference) in some other assemblies Assb1 
and Assb2. 

In Assb1 i do not want Cls2 to be visible, but Cls1 should be visible.Here i 
should be able to get the property values, setting property values should not 
be allowed.

In Assb2 i want both to be visible, also from Assb2 i can set/get the 
properties of Cls1.

how can i achieve this functionality, is there any way with CAS? Please let 
me know. Thanks