Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "MetroStyle" and then click OK
Step 2: Right click on your project select Manage NuGet Packages -> Search metro framework -> Install
If you don't see the metro framework in your toolbox, you can view How to download and install metro framework
Step 3: Design metro form as below

Step 4: Add code to handle your metro form as below
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MetroStyle
{
public partial class Form1 : MetroFramework.Forms.MetroForm
{
public Form1()
{
InitializeComponent();
//Set style manager
this.StyleManager = metroStyleManager1;
}
private void mbTheme_SelectedIndexChanged(object sender, EventArgs e)
{
//Select metro theme
switch (mbTheme.SelectedIndex)
{
case 0:
metroStyleManager1.Theme = MetroFramework.MetroThemeStyle.Dark;
break;
case 1:
metroStyleManager1.Theme = MetroFramework.MetroThemeStyle.Light;
break;
}
}
private void mbColor_SelectedIndexChanged(object sender, EventArgs e)
{
//Select metro color
metroStyleManager1.Style = (MetroFramework.MetroColorStyle)Convert.ToInt32(mbColor.SelectedIndex);
}
private void Form1_Load(object sender, EventArgs e)
{
mbColor.SelectedIndex = 0;
mbTheme.SelectedIndex = 0;
}
}
}
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