a tiny c# project that shows the use of the system timer class that periodically calls a class method after a specified amount of time.

main.cs

using System;
using System.Timers;

namespace MainPackage
{
	class MainClass
	{
		private static Timer timer;

		static void Main(string[] args)
		{
			timer = new Timer(1000);  // 1 second interval
			timer.Elapsed += TimerElapsed;
			timer.AutoReset = true;
			timer.Start();

			Console.WriteLine("Press any key to exit...");
			Console.ReadKey();

			// Stop timer after keypress before exit
			timer.Stop();
			timer.Dispose();

			Console.WriteLine("Goodbye.");
		}

		private static void TimerElapsed(object sender, ElapsedEventArgs e)
		{
			Console.WriteLine("{0:d} {0:T}", DateTime.Now);
		}
	}
}

main.csproj

<?xml version="1.0" encoding="utf-8"?>
<Project
	xmlns="http://schemas.microsoft.com/developer/msbuild/2003"
	Sdk="Microsoft.NET.Sdk"
	DefaultTargets="Build"
>
	<PropertyGroup>
		<AssemblyName>main</AssemblyName>
		<OutputPath>bin\</OutputPath>
	</PropertyGroup>

	<ItemGroup>
		<Compile Include="main.cs" />
	</ItemGroup>

	<Target Name="Build" Inputs="@(Compile)" Outputs="$(OutputPath)$(AssemblyName).exe">
		<MakeDir Directories="$(OutputPath)" Condition="!Exists('$(OutputPath)')" />
		<Csc Sources="@(Compile)" OutputAssembly="$(OutputPath)$(AssemblyName).exe">
			<Output TaskParameter="OutputAssembly" ItemName="OutputFile" />
		</Csc>
		<Message Text="Generated file: @(OutputFile)" Condition="Exists('@(OutputFile)')" />
	</Target>

	<Target Name="Clean" >
		<Delete Files="$(OutputPath)$(AssemblyName).exe" />
	</Target>

	<Target Name="Rebuild" DependsOnTargets="Clean;Build" />
</Project>