你可以使用C#编程语言来编写一个通用的扩展方法，用于将一个对象的值复制到另一个对象，并且修改目标对象的属性时原始对象不受影响。

以下是一个示例代码：

using System;
using System.Reflection;public static class ObjectExtensions
{public static void CopyPropertiesTo<T>(this object source, T destination){if (source == null)throw new ArgumentNullException(nameof(source));if (destination == null)throw new ArgumentNullException(nameof(destination));Type sourceType = source.GetType();Type destinationType = typeof(T);PropertyInfo[] sourceProperties = sourceType.GetProperties();PropertyInfo[] destinationProperties = destinationType.GetProperties();foreach (var sourceProperty in sourceProperties){foreach (var destinationProperty in destinationProperties){if (sourceProperty.Name == destinationProperty.Name && sourceProperty.PropertyType == destinationProperty.PropertyType &&destinationProperty.CanWrite){object value = sourceProperty.GetValue(source);destinationProperty.SetValue(destination, value);break;}}}}
}

可以按照以下方式使用该扩展方法：

public class A
{public int Foo { get; set; }public string Bar { get; set; }
}public class B
{public int Foo { get; set; }public string Bar { get; set; }
}public class Program
{static void Main(){A a = new A { Foo = 42, Bar = "Hello" };B b = new B();a.CopyPropertiesTo(b);Console.WriteLine($"a: Foo = {a.Foo}, Bar = {a.Bar}");Console.WriteLine($"b: Foo = {b.Foo}, Bar = {b.Bar}");b.Foo = 100; // 修改b对象的属性值Console.WriteLine($"a: Foo = {a.Foo}, Bar = {a.Bar}");Console.WriteLine($"b: Foo = {b.Foo}, Bar = {b.Bar}");}
}