winform 背景颜色渐变动效

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        Color blueColor = Color.FromArgb（71 165 221）;//蓝色
        Color pinkColor = Color.FromArgb（255 57 95）;//粉色
        Color orangeColor = Color.FromArgb（255 181 66）;//橙色
        Color aquaColor = Color.FromArgb（85 193 193）;//青色
        Color greenColor = Color.FromArgb（157 187 97）;//绿色
        Color finalColor;
        int step = 7;
        int stepR stepG stepB;
        private

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     51712  2016-04-22 01:34  背景渐变动效Demo\.vs\背景渐变动效Demo\v14\.suo

     文件        184  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\App.config

     文件        189  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.config

     文件        490  2015-10-30 15:19  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest

     文件      11264  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.exe

     文件        184  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.exe.config

     文件      24064  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.pdb

     文件      22688  2016-04-22 01:17  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.vshost.exe

     文件        184  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.vshost.exe.config

     文件        490  2015-10-30 15:19  背景渐变动效Demo\WindowsFormsApplication1\bin\Debug\背景渐变动效Demo.vshost.exe.manifest

     文件       4134  2016-04-22 01:13  背景渐变动效Demo\WindowsFormsApplication1\Form1.cs

     文件       7060  2016-04-22 01:09  背景渐变动效Demo\WindowsFormsApplication1\Form1.Designer.cs

     文件       6011  2016-04-22 01:09  背景渐变动效Demo\WindowsFormsApplication1\Form1.resx

     文件        180  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\Demo.Properties.Resources.resources

     文件       1982  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       7293  2016-04-22 01:17  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件          0  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

     文件          0  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

     文件          0  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

     文件       3584  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

     文件       1191  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt

     文件       1013  2016-04-22 01:09  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.GenerateResource.Cache

     文件       4176  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csprojResolveAssemblyReference.cache

     文件        180  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Form1.resources

     文件        373  2016-04-22 01:17  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\背景渐变动效Demo.csproj.FileListAbsolute.txt

     文件      11264  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\背景渐变动效Demo.exe

     文件      24064  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\obj\Debug\背景渐变动效Demo.pdb

     文件        536  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\Program.cs

     文件       1356  2016-04-19 09:14  背景渐变动效Demo\WindowsFormsApplication1\Properties\AssemblyInfo.cs

     文件       2848  2016-04-22 01:16  背景渐变动效Demo\WindowsFormsApplication1\Properties\Resources.Designer.cs

............此处省略20个文件信息