怎么安装ExpressionTreeVisualizer for Visual Studio 2019

1、下载  ExpressionTreeVisualizer   https://github.com/zspitz/ExpressionTreeVisualizer/releases    ,  解压后把相应dll文件拷贝相应的目录

2、拷贝到以下路径之中的任何一个。

• sualStudioInstallPath \Common7\Packages\Debugger\Visualizers（这个是路径模板格式）  例如：C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Packages\Debugger\Visualizers


• My Documents\ VisualStudioVersion \Visualizers（这个是路径模板格式） 

• 

3、拷贝到以下路径之中的任何一个。

• VisualStudioInstallPath \Common7\Packages\Debugger\Visualizers\ Framework 例如：C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Packages\Debugger\Visualizers\Framework
  

• 

• My Documents\ VisualStudioVersion \Visualizers\ Framework

where Framework is either:

• net2.0 for debuggees running the .NET Framework runtime
• netstandard2.0 for debuggees using a runtime that supports netstandard 2.0 (.NET Framework v4.6.1+ or .NET Core 2.0+).
• netcoreapp for debuggees running the .NET Core runtime. (supports .NET Core 2.0+)(我是用这个框架我就拷贝这个框架下面)

测试案例：

大幅度反对法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;

namespace TestVisualizer
{
    class Program
    {
        static void Main(string[] args)
        {

            List<PeopleCopy> peoleCopyList = new List<PeopleCopy>();
            for (int i = 0; i < 5; i++)
            {
                People people = new People() { Id = 5 + 1, Age = 25, Name = "aaa" + i };
                peoleCopyList.Add(ExpressionTree.TransExp<People, PeopleCopy>(people));
            }
            foreach (var item in peoleCopyList)
            {
                Console.WriteLine(item);
            }
            Console.Read();

        }
    }
    public class People
    {
        public int Age { get; set; }
        public string Name { get; set; }

        public int Id;

    }

        public class PeopleCopy
        {
            public int Age { get; set; }
            public string Name { get; set; }

            public int Id;

            public override string ToString()
            {
                return "Age=" + Age + ";Name=" + Name + ";Id=" + Id;
            }
        }
    public class ExpressionTree
    {

        private static Dictionary<string, object> _Dic = new Dictionary<string, object>();
       public static TOut TransExp<TIn, TOut>(TIn tIn)
        {
            string key = $"funckey_{typeof(TIn).FullName}_{typeof(TOut).FullName}";
            if (!_Dic.Keys.Contains(key))
            {
                ParameterExpression parameterExpression = Expression.Parameter(typeof(TIn), "p");
                List<MemberBinding> memberBindingList = new List<MemberBinding>();
                foreach (var item in typeof(TOut).GetProperties())
                {
                    PropertyInfo propertyInfo = typeof(TIn).GetProperty(item.Name);
                    if (propertyInfo == null) { continue; }
                    MemberExpression property = Expression.Property(parameterExpression, propertyInfo);
                    memberBindingList.Add(Expression.Bind(item, property));
                }
                foreach (var item in typeof(TOut).GetFields())
                {
                    FieldInfo fieldInfo = typeof(TIn).GetField(item.Name);
                    if (fieldInfo == null) { continue; }
                    MemberExpression property = Expression.Field(parameterExpression, fieldInfo);
                    memberBindingList.Add(Expression.Bind(item, property));
                }
                Expression<Func<TIn, TOut>> expression = Expression.Lambda<Func<TIn, TOut>>(Expression.MemberInit(Expression.New(typeof(TOut)), memberBindingList), new ParameterExpression[]
                {
parameterExpression
                });
                Func<TIn, TOut> func = expression.Compile();
                _Dic.Add(key, func);
            }
            return ((Func<TIn, TOut>)_Dic[key])(tIn);
        }

    }

}