I create a snippet code in Visual Studio 2019 community, I can key in so and tab double to bring the code I defined. But I cannot bring the class name to the snippet code. Could someone help me to solve this problem?
<?xml version="1.0" encoding="utf-8"?>
<CodeSnippets xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
<CodeSnippet Format="1.0.0">
<Header>
<Title>ScriptableObject Unity</Title>
<Shortcut>so</Shortcut>
<Description>ScriptableObject Unity 陳述式的程式碼片段</Description>
<Author>Microsoft Corporation</Author>
<SnippetTypes>
<SnippetType>Expansion</SnippetType>
<SnippetType>SurroundsWith</SnippetType>
</SnippetTypes>
</Header>
<Snippet>
<Declarations>
<Literal Editable="false">
<ID>classname</ID>
<ToolTip>Class name</ToolTip>
<Function>ClassName()</Function>
<Default>ClassNamePlaceholder</Default>
</Literal>
</Declarations>
<Code Language="csharp">
<![CDATA[[CreateAssetMenu(fileName ="New $classname$",menuName ="$classname$", order =0)]
public class $classname$ : ScriptableObject
{
}]]>
</Code>
</Snippet>
</CodeSnippet>
</CodeSnippets>