# Dialogue Class in [Yarn](https://docs.yarnspinner.dev/2.0/api/csharp/yarn) Inherits from `System.Object` ## Summary Co-ordinates the execution of Yarn programs. ```csharp public class Dialogue : IAttributeMarkerProcessor ``` ## Constructors | Name | Description | | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- | | [Dialogue(Yarn.IVariableStorage)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue..ctor) | Initializes a new instance of the [Dialogue](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue) class. | ## Fields | Name | Description | | ------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------- | | [DefaultStartNodeName](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.defaultstartnodename) | The node that execution will start from. | ## Methods | Name | Description | | ------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [AddProgram(Program)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.addprogram) | Loads the nodes from the specified [Program](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.program) , and adds them to the nodes already loaded. | | [Continue()](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.continue) | Starts, or continues, execution of the current Program. | | [ExpandSubstitutions(string,IList)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.expandsubstitutions) | Replaces all substitution markers in a text with the given substitution list. | | [GetStringIDForNode(string)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.getstringidfornode) | Returns the string ID that contains the original, uncompiled source text for a node. | | [GetTagsForNode(string)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.gettagsfornode) | Returns the tags for the node `nodeName` . | | [NodeExists(string)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.nodeexists) | Gets a value indicating whether a specified node exists in the Program. | | [ParseMarkup(string)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.parsemarkup) | Parses a line of text, and produces a [MarkupParseResult](https://docs.yarnspinner.dev/2.0/api/csharp/yarn.markup/yarn.markup.markupparseresult) containing the results. | | [SetNode(string)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.setnode) | Prepares the [Dialogue](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue) that the user intends to start running a node. | | [SetProgram(Program)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.setprogram) | Loads all nodes from the provided [Program](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.program) . | | [SetSelectedOption(int)](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.setselectedoption) | Signals to the [Dialogue](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue) that the user has selected a specified [Option](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.optionset/yarn.optionset.option) . | | [Stop()](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.stop) | Immediately stops the [Dialogue](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue) . | | [UnloadAll()](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.unloadall) | Unloads all nodes from the Dialogue. | ## Properties | Name | Description | | ------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [CommandHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.commandhandler) | Gets or sets the [CommandHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.commandhandler) that is called when a command is to be delivered to the game. | | [CurrentNode](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.currentnode) | Gets the name of the node that this Dialogue is currently executing. | | [DialogueCompleteHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.dialoguecompletehandler) | Gets or sets the [DialogueCompleteHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialoguecompletehandler) that is called when the dialogue reaches its end. | | [IsActive](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.isactive) | Gets a value indicating whether the Dialogue is currently executing Yarn instructions. | | [LanguageCode](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.languagecode) | Gets or sets the [Dialogue](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue) 's locale, as an IETF BCP 47 code. | | [Library](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.library) | Gets the [Library](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.library) that this Dialogue uses to locate functions. | | [LineHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.linehandler) | Gets or sets the [LineHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.linehandler) that is called when a line is ready to be shown to the user. | | [LogDebugMessage](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.logdebugmessage) | Invoked when the Dialogue needs to report debugging information. | | [LogErrorMessage](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.logerrormessage) | Invoked when the Dialogue needs to report an error. | | [NodeCompleteHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.nodecompletehandler) | Gets or sets the [NodeCompleteHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.nodecompletehandler) that is called when a node is complete. | | [NodeNames](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.nodenames) | Gets the names of the nodes in the currently loaded Program. | | [NodeStartHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.nodestarthandler) | Gets or sets the [NodeStartHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.nodestarthandler) that is called when a node is started. | | [OptionsHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.optionshandler) | Gets or sets the [OptionsHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.optionshandler) that is called when a set of options are ready to be shown to the user. | | [PrepareForLinesHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.prepareforlineshandler) | Gets or sets the [PrepareForLinesHandler](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.prepareforlineshandler) that is called when the dialogue anticipates delivering some lines. | | [VariableStorage](https://docs.yarnspinner.dev/2.0/api/csharp/yarn/yarn.dialogue/yarn.dialogue.variablestorage) | Gets or sets the object that provides access to storing and retrieving the values of variables. |