using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var text = "INSERT INTO TestTable\r\n(\r\n    Test1,\r\n    Test2,\r\n    Test3,\r\n    Test4,\r\n    Test5\r\n)\r\nVALUES\r\n(\r\n    @Test1,\r\n    @Test2,\r\n\r\n    @Test3,\r\n    @Test4,\r\n\r\n    @Test5\r\n)\r\n\r\nSET @Id = SCOPE_IDENTITY()";
    	var result = Regex.Matches(text, @"\B@\w+\b(?!\s*=)")
    		.Cast<Match>()
    		.Select(x => x.Value);
        foreach (var s in result)
        	Console.WriteLine(s);
	}
}