BEST PRACTICES: Provide Equatable

Generic collection classes such as List, Dictionary, Stack, and Queue provide
Contains and other methods that compare objects for equality. Microsoft recommends that any class that you are likely to place in one of these generic collections should implement IEquatable.

IEquatable 은 좀 뜻밖이군.

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Oracle NLS_DATE_FORMAT 변경

1) 오라클 환경변수 조회하기 select * from v$nls_parameters; 2) 날짜형식 변경하기 alter session set nls_date_format = 'YYYY-MM-DD'; //datefromat변경 alter session set nls_timestamp_format = 'YYYY-MM-DD HH:MI:SS'; // timestamp_format변경 3) 정상적으로 변경되었는지 확인 select * from emp where hiredate = '1981-02-22'; /*alter [session/system]  1. session : 현재접속한 session(쿼리)에서만 변경  2. system : database자체를 변경   scope=[both/spfile]   -both : 바로적용 또는 재시작(오류날 가능성이 높다)   -spfile : DB를 재시작후에 변경 */ **SQL Command Line으로 들어가서 system계정으로 접속해서 바꿔야 한다.(영구적 변경) alter system  set nls_date_format = 'YYYY-MM-DD'   scope=spfile; alter system  set nls_timestamp_format = 'YYYY-MM-DD HH:MI:SS'   scope=spfile; 4)sqlplus에 sys as sysdba 로 접속해서, shutdown immediate;startup; 실행
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Alternative to IValueConvert, QuickConverter

https://quickconverter.codeplex.com/ Quick Setup Steps Add the assembly reference to your project. This can also easily be done using  the NuGet package . Add the namespaces to Quick Converter that it will need to know about (before any xaml that uses it is loaded). e.g. In your WPF application's App.xaml.cs file: public   partial   class   App  :  Application { public  App() :  base () { // Setup Quick Converter. // Add the System namespace so we can use primitive types (i.e. int, etc.). QuickConverter. EquationTokenizer .AddNamespace( typeof ( object )); // Add the System.Windows namespace so we can use Visibility.Collapsed, etc. QuickConverter. EquationTokenizer .AddNamespace( typeof (System.Windows. Visibility )); } } Add the Quick Converter namespace to your xaml files so you can ref...
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Reflection with IDispatch-based COM objects

Reflection with IDispatch-based COM objects #region Using Directives using System; using System.Reflection; using System.Runtime.InteropServices; using System.Security.Permissions; #endregion namespace COM_Test { /// <summary> /// Provides helper methods for working with COM IDispatch objects that have a registered type library. /// </summary> public static class DispatchUtility { #region Private Constants private const int S_OK = 0; //From WinError.h private const int LOCALE_SYSTEM_DEFAULT = 2 << 10; //From WinNT.h == 2048 == 0x800 #endregion #region Public Methods /// <summary> /// Gets whether the specified object implements IDispatch. /// </summary> /// <param name="obj">An object to check.</param> /// <returns>True if the object implements IDispatch.  False otherwise.</returns> public static bool ImplementsIDispatch(object obj) { bool result = obj is ID...
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