Two Tier Project In Asp.Net

Step 1 : Add Asp Project
Step 2 : Right Click On Solution To Add New "Class Library"project
Step 3 : Add Class File To "Class Library"project
Step 4 : Write Function In This Class File
Step 5 : Build "Class Library" project To Create Its Own "Dll" File
Step 6 : Refer Class Library" project from Asp Project
Step 7 : Using Class Library" DLL to Asp Project
               
              Ex:  using DB_Manager;

NOTE: each top layer only asks the below layer and never sees anything on top of it.
Here UI section is top Layer 
Reference is : UI to DB (not refer back)

• Right Click On Solution To Add New "Class Library"project

• Add Codes To Class file [ Contained in DB_Manager Project]

• Rebulid to get .DLL file

• Dll file Created after build project

• Refer Class Library" project from Asp Project

• Reference is completed...But we can't Access DB_Manager
• Using Class Library" DLL to Asp Project 
• Ex:  using DB_Manager; 

  

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Convert This Project to Three Tier Concept