项目Demo地址：https://github.com/SwaggyMacro/CefSharpDemo
通常安装最新版本的CefSharp（根据自己项目需求而定），建议完全关闭VS，然后重新打开（这样可以确保你的引用显示，并有完整的intellisense），否则你可能会发生错误：找不到类型或命名空间名称“Cefsharp”（是否缺少using指令或程序集引用？）

1️⃣让CefSharp在项目二级目录运行

在程序运行目录新建一个文件夹存放CefSharp文件，例如 "resources\chromium"
CefSharp类库文件获取可以使用Nuget安装，安装成功后按F5运行一次程序就会在程序运行目录生成相关库文件了。
添加CefSharp引用
设置引用"复制本地"为False
在"App.config"中添加以下 runtime，其中 "privatePath" 为CefSharp的存放路径

<runtime>
	<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
		<probing privatePath="resources/chromium"/>
	</assemblyBinding>
</runtime>

如果添加之后重启VS仍然还是报找不到引用的话尝试添加成以下内容

<runtime>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
				<bindingRedirect oldVersion="0.0.0.0-2.6.10.0" newVersion="2.6.10.0" />
			</dependentAssembly>
			<dependentAssembly>
				<assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
				<bindingRedirect oldVersion="0.0.0.0-2.6.10.0" newVersion="2.6.10.0" />
			</dependentAssembly>
		</assemblyBinding>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<probing privatePath="resources/chromium"/>
		</assemblyBinding>
	</runtime>

在程序入口处添加初始化Cef函数

  /// <summary>
        ///     初始化Cef配置
        /// </summary>
        [MethodImpl(MethodImplOptions.NoInlining)]
        private static void InitializeCef()
        {
            var settings = new CefSettings
            {
                BrowserSubprocessPath = browser,
                LocalesDirPath = locales,
                ResourcesDirPath = res
            };
            Cef.Initialize(settings);
        }

初始化Cefsharp
lib、browser、locals、res的路径填你存放的路径，这里我存放在"resources\chromium\"

 private static void Main()
        {
            lib = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"resources\chromium\libcef.dll");
            browser = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"resources\chromium\CefSharp.BrowserSubprocess.exe");
            locales = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"resources\chromium\locales\");
            res = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"resources\chromium\");

            var libraryLoader = new CefLibraryHandle(lib);
            var isValid = !libraryLoader.IsInvalid;
            if (isValid)
            {
                InitializeCef();
            }

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }

在调用CefSharp的窗口类实例化ChromiumWebBrowser类即可

            String url = "http://map.baidu.com/";

            // Initialize cef with the provided settings
            // Create a browser component
            browser = new ChromiumWebBrowser(url);

            // Add it to the form and fill it to the form window.
            this.Controls.Add(browser);
            browser.Dock = DockStyle.Fill;

            // Allow the use of local resources in the browser
            BrowserSettings browserSettings = new BrowserSettings();
            browser.BrowserSettings = browserSettings;

2️⃣ JavaScript交互

C# 调用JS函数不获取返回值

browser.ExecuteScriptAsync("alert('This message from JavaScript');");

C# 调用JS函数并获取返回值
建议是最好用await，或者你可以把代码写在ContinueWith里面。

        async private void button1_Click(object sender, EventArgs e)
        {
            var javaScript = @"(function () {
                return document.getElementsByTagName('title')[0].innerText;
            })();";
            var result = await browser.GetMainFrame().EvaluateScriptAsync(javaScript)
            .ContinueWith(t =>
            {
                var _result = t.Result;
                return _result.Result;
            });
            MessageBox.Show(result.ToString());
        }

JavaScript调用C#函数传参+返回
首先在C#新写一个类给JS调用

public class CSharpObject
        {
            public string getMessage(string msg)
            {
                string ret = $"This message return from C#: {msg}";
                return ret;
            }
        }

然后把写好的类实例化注册给Browser，如果是CefSharp的版本比较老的话可能要用注释掉的那一行来注册对象。

browser.JavascriptObjectRepository.Settings.LegacyBindingEnabled = true;
//browser.RegisterAsyncJsObject("CSharpObject", new CSharpObject());
browser.JavascriptObjectRepository.Register("CSharpObject", new CSharpObject(), isAsync: false, options: BindingOptions.DefaultBinder);

JS调用C#函数
方便写我直接在C#调用JS来调用C#的函数了（有点拗口哈哈哈）

browser.ExecuteScriptAsync("alert(CSharpObject.getMessage('Test Call'));");