How Many Types are loaded for Hello World

Consider the following super simple C# code

namespace SmartDeviceProject1
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Console.WriteLine("Hello");
        }
    }
}

Can you guess how many managed Type gets loaded to run this? I was doing some profiling the .NET Compact Framework loader (for entirely unrelated reason) and was surprised by the list that got dumped. 87 types**, never could've guessed that...

System.Object
System.ValueType
System.Type
System.Reflection.MemberInfo
System.Delegate
System.MarshalByRefObject
System.SystemException
System.Exception
System.Attribute
System.Collections.Hashtable
System.Enum
System.Reflection.BindingFlags
System.MulticastDelegate
System.Reflection.MemberFilter
System.Reflection.Binder
System.Reflection.TypeAttributes
System.DateTime
System.Collections.IDictionary
System.UnhandledExceptionEventHandler
System.AppDomainManager
System.Version
System.Decimal
System.Runtime.InteropServices.ComInterfaceType
System.Collections.ICollection
System.Collections.IEqualityComparer
System.AppDomainManagerInitializationOptions
System.ArithmeticException
System.ArgumentException
System.MissingMemberException
System.MemberAccessException
System.AppDomainSetup
System.Reflection.AssemblyName
System.Globalization.CultureInfo
System.Reflection.Assembly
System.Configuration.Assemblies.AssemblyHashAlgorithm
System.Configuration.Assemblies.AssemblyVersionCompatibility
System.Reflection.AssemblyNameFlags
System.Globalization.CultureTableRecord
System.Globalization.CompareInfo
System.Globalization.TextInfo
System.Globalization.NumberFormatInfo
System.Globalization.DateTimeFormatInfo
System.Globalization.Calendar
System.Globalization.BaseInfoTable
System.Globalization.CultureTable
System.Globalization.CultureTableData
System.Globalization.NumberStyles
System.Globalization.DateTimeStyles
System.Globalization.DateTimeFormatFlags
System.Globalization.TokenHashValue
System.Globalization.CultureTableHeader
System.Globalization.CultureNameOffsetItem
System.Globalization.RegionNameOffsetItem
System.Globalization.IDOffsetItem
System.TokenType
System.Char
System.IO.TextReader
System.IO.TextWriter
System.IFormatProvider
System.Console
System.RuntimeTypeHandle
System.NotSupportedException
System.Globalization.EndianessHeader
System.Reflection.Missing
System.RuntimeType
System.Threading.StackCrawlMark
System.Globalization.CultureTableItem
System.Int32
System.Security.CodeAccessSecurityEngine
System.AppDomain
System.LocalDataStoreMgr
System.Threading.ExecutionContext
System.LocalDataStore
System.Collections.ArrayList
System.Threading.SynchronizationContext
System.Runtime.Remoting.Messaging.LogicalCallContext
System.Runtime.Remoting.Messaging.IllogicalCallContext
System.Threading.Thread
System.Collections.Generic.Dictionary`2
System.Runtime.Remoting.Messaging.CallContextRemotingData
System.RuApplication starting
System.Collections.Generic.IEqualityComparer`1
Runtime.Remoting.Messaging.CallContextSecurityData
System.Array
System.RuntimeFieldHandle
System.Globalization.CultureTableRecord[]
System.Text.StringBuilder

**This is for the compact framework CLR. Your mileage will vary if you run the same on the desktop CLR.

Bong Geek - Abhinaba Basu

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Sunday, September 14, 2008

How Many Types are loaded for Hello World

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