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AspClassic.Parser/VariableNameCollection.cs

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+using System;
+using System.Collections.Generic;
+
+namespace AspClassic.Parser;
+
+/// <summary>
+/// A read-only collection of variable names.
+/// </summary>
+public sealed class VariableNameCollection : CommaDelimitedTreeCollection<VariableName>
+{
+	/// <summary>
+	/// Constructs a new variable name collection.
+	/// </summary>
+	/// <param name="variableNames">The variable names in the collection.</param>
+	/// <param name="commaLocations">The locations of the commas in the collection.</param>
+	/// <param name="span">The location of the parse tree.</param>
+	public VariableNameCollection(IList<VariableName> variableNames, IList<Location> commaLocations, Span span)
+		: base(TreeType.VariableNameCollection, variableNames, commaLocations, span)
+	{
+		if (variableNames == null || variableNames.Count == 0)
+		{
+			throw new ArgumentException("VariableNameCollection cannot be empty.");
+		}
+	}
+}