C# and .NET Notes

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  C#: Test For Elevated Privileges October 24, 2014

  Find out whether your code is running as administrator by testing the current Windows principal for the built-in Administrator role.

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  WF 4.0: NullReferenceException in ActivityXamlServices.Load May 20, 2014

  Loading workflow XAML from a database fails with an unknown-type exception or a bare NullReferenceException. What the errors mean and the workaround that loaded the activity.

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  Dynamically Determine MIME Types in C# March 10, 2014

  Windows already knows the MIME type of most file extensions. Read the Content Type value under HKEY_CLASSES_ROOT instead of shipping your own lookup table.

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  ANTLR cannot generate ‘org.antlr.v4.codegen.CSharp_v4_5_1Target’ code as of version 4.1-SNAPSHOT February 16, 2014

  The ANTLR 4 C# target refused to generate code for a grammar. Setting the project's target framework to .NET Framework 4.5 made the build succeed, plus the full error output.

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  Change Current Thread’s Currency Symbol July 16, 2013

  The current thread's culture is read-only, so assigning a new CurrencySymbol throws. Clone the CultureInfo, change the symbol, and assign the clone back to the thread.

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  A Flexible And Convenient Type Conversion Helper in C# May 21, 2013

  A small reusable C# helper that converts an object to a target type known only at run time, so calling code stays readable instead of turning into if-then-else chains.

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