Does the whole .NET assembly get loaded in memory or just the parts used?

If I have a 15M .NET assembly and a program calls a method in it, does the whole assembly get loaded into memory and use 15M or a lot less? (assuming the assembly is not allocatin开发者_StackOverflow社区g any memory during runtime)

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AFAIK, all assembly gets loaded into current AppDomain;

Also, check this link for more information on subject: Why isn't there an Assembly.Unload method?

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How about this? If we capture a process dump (full memory dump) of your program, we can extract all the assemblies from that dump. Is that a sign that all assemblies are actually loaded into memory?