CLR is the Common Language Runtime for the dotnet frame work. CTS is the Common Type Sytem for all languages.It consists of the types(Class,Enums,Structs,Interfaces etc for any language)
CTS is one of the component of CLR.
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How to create a DB connection at one place/page so that we can use that connection for all pages/forms/windows.what r the steps ned to be performed. if question not clear,let me know.