C# partial class different namespaceWhat is partial class in c#C# partial static classC# partial class share propertiesC# partial class when to useC# partial class filenamePartial Classes in C# - GeeksforGeeks
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A partial class is a special feature of C#. It provides a special ability to implement the functionality of a single class into multiple ... 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ChangeLanguage DataStructuresAlgorithmsInterviewPreparationTopic-wisePracticeC++JavaPythonCompetitiveProgrammingMachineLearningJavaScriptSDESheetPuzzlesGFGSchoolProjects RelatedArticles ▲RelatedArticlesC#|StaticClassPartialClassesinC#PartialMethodsinC#ExtensionMethodinC#LocalFunctioninC#C#|DelegatesC#|PredicateDelegateC#|ActionDelegateC#|FuncdelegateDelegatesvsInterfacesinC#C#|ExplicitInterfaceImplementationGarbageCollectioninC#|.NETFrameworkSettinguptheenvironmentinC#HelloWorldinC#CommonLanguageRuntime(CLR)inC#C#|IdentifiersC#|DataTypesC#|VariablesC#|LiteralsC#|OperatorsC#|KeywordsSwitchStatementinC#LoopsinC#C#|JumpStatements(Break,Continue,Goto,ReturnandThrow)C#|ClassandObjectC#|IsNullOrEmpty()MethodDifferencebetweenAbstractClassandInterfaceinC#C#|ArraysofStringsC#|HowtocheckwhetheraListcontainsaspecifiedelementString.Split()MethodinC#withExamplesC#|StaticClassPartialClassesinC#PartialMethodsinC#ExtensionMethodinC#LocalFunctioninC#C#|DelegatesC#|PredicateDelegateC#|ActionDelegateC#|FuncdelegateDelegatesvsInterfacesinC#C#|ExplicitInterfaceImplementationGarbageCollectioninC#|.NETFrameworkSettinguptheenvironmentinC#HelloWorldinC#CommonLanguageRuntime(CLR)inC#C#|IdentifiersC#|DataTypesC#|VariablesC#|LiteralsC#|OperatorsC#|KeywordsSwitchStatementinC#LoopsinC#C#|JumpStatements(Break,Continue,Goto,ReturnandThrow)C#|ClassandObjectC#|IsNullOrEmpty()MethodDifferencebetweenAbstractClassandInterfaceinC#C#|ArraysofStringsC#|HowtocheckwhetheraListcontainsaspecifiedelementString.Split()MethodinC#withExamplesPartialClassesinC#ViewDiscussion ImproveArticle SaveArticle LikeArticle DifficultyLevel: EasyLastUpdated: 17Nov,2020ReadDiscussViewDiscussion ImproveArticle SaveArticle LikeArticle ApartialclassisaspecialfeatureofC#.Itprovidesaspecialabilitytoimplementthefunctionalityofasingleclassintomultiplefilesandallthesefilesarecombinedintoasingleclassfilewhentheapplicationiscompiled.Apartialclassiscreatedbyusingapartialkeyword.Thiskeywordisalsousefultosplitthefunctionalityofmethods,interfaces,orstructureintomultiplefiles.Syntax: publicpartialClas_name { //code } Importantpoints: Whenyouwanttochopthefunctionalityoftheclass,method,interface,orstructureintomultiplefiles,thenyoushouldusepartialkeywordandallthefilesaremandatorytobeavailableatcompiletimeforcreatingthefinalfile.Thepartialmodifiercanonlypresentinstantlybeforethekeywordslikestruct,class,andinterface.Everypartofthepartialclassdefinitionshouldbeinthesameassemblyandnamespace,butyoucanuseadifferentsourcefilename.Everypartofthepartialclassdefinitionshouldhavethesameaccessibilityasprivate,protected,etc.Ifanypartofthepartialclassisdeclaredasanabstract,sealed,orbase,thenthewholeclassisdeclaredofthesametype.Theuserisalsoallowedtousenestedpartialtypes.Dissimilarpartsmayhavedissimilarbasetypes,butthefinaltypemustinheritallthebasetypes.Example:Here,wearetakingaclassnamedGeeksandsplitthedefinitionofGeeksclassintotwodifferentfilesnamedGeeks1.cs,andGeeks2.csasshownbelow: InGeeks1.cs,andGeeks2.cs,apartialclassiscreatedusingthepartialkeywordandeachfilecontainsdifferentfunctionalityofGeeksclassasshownbelow.Geeks1.csC#publicpartialclassGeeks{ privatestringAuthor_name; privateintTotal_articles; publicGeeks(stringa,intt) { this.Authour_name=a; this.Total_articles=t; }}Geeks2.cs C#publicpartialclassGeeks{ publicvoidDisplay() { Console.WriteLine("Author'snameis:"+Author_name); Console.WriteLine("Totalnumberarticlesis:"+Total_articles); }}Whenweexecutetheabovecode,thecompilercombinesGeeks1.csandGeeks2.csintoasinglefile,i.e.Geeksasshownbelow.GeeksThisclassmaycontaintheMainMethod.Forsimplicity,hereMain()methodisnotincluded. C#publicclassGeeks{ privatestringAuthor_name; privateintTotal_articles; publicGeeks(stringa,intt) { this.Authour_name=a; this.Total_articles=t; } publicvoidDisplay() { Console.WriteLine("Author'snameis:"+Author_name); Console.WriteLine("Totalnumberarticlesis:"+Total_articles); }}Advantages: Withthehelpofpartialclasses,multipledeveloperscanworksimultaneouslyinthesameclassindifferentfiles.Withthehelpofapartialclassconcept,youcansplittheUIofthedesigncodeandthebusinesslogiccodetoreadandunderstandthecode.Whenyouwereworkingwithautomaticallygeneratedcode,thecodecanbeaddedtotheclasswithouthavingtorecreatethesourcefilelikeinVisualstudio.Youcanalsomaintainyourapplicationinanefficientmannerbycompressinglargeclassesintosmallones. MyPersonalNotes arrow_drop_upSave LikePreviousC#|StaticClassNext PartialMethodsinC#RecommendedArticlesPage:13,Dec1824,Dec1826,Aug1928,Sep2120,Nov2112,Nov1805,Sep2221,Aug2221,Aug2215,Aug2201,Aug2220,Jul22ArticleContributedBy:ankita_saini@ankita_sainiVotefordifficultyCurrentdifficulty: EasyEasy Normal Medium Hard ExpertImprovedBy:adonislanArticleTags:CSharp-OOPC#ReportIssueWritingcodeincomment? Pleaseuseide.geeksforgeeks.org, generatelinkandsharethelinkhere. LoadCommentsPleaseLogintocomment...What'sNewViewDetailsViewDetailsViewDetailsImproveyourCodingSkillswithPracticeTryIt! Weusecookiestoensureyouhavethebestbrowsingexperienceonourwebsite.Byusingoursite,you acknowledgethatyouhavereadandunderstoodour CookiePolicy& PrivacyPolicy GotIt! StartYourCodingJourneyNow!Login Register
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即使將公共的lib拆出去，也無法避免公共層過大。經學長推薦，筆者研讀lidgren原始碼，才了解C# 有一個特殊的用法partial可以協助Prgrammer採分檔案。
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