c# BinaryFormatter 更换了命名空间反序列化遇到的问题

解决方案：

sealed class AllowAllAssemblyVersionsDeserializationBinder : System.Runtime.Serialization.SerializationBinder
        {
            public override Type BindToType(string assemblyName, string typeName)
            {
                Type typeToDeserialize = null;

                String currentAssembly = System.Reflection.Assembly.GetExecutingAssembly().FullName;
                typeName = typeName.Replace("oldnamespace", "newnamespace");
                assemblyName = currentAssembly;

                typeToDeserialize = Type.GetType(String.Format("{0}, {1}",
                    typeName, assemblyName));
                return typeToDeserialize;
            }
        }
调用：
private static String fileName = "x:xxxxxx";
public static YourType yourType = new YourType();
            Stream fStream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            if (!fStream.Equals(null))
            {
                BinaryFormatter binFormat = new BinaryFormatter();//创建二进制序列化器
                binFormat.Binder = new AllowAllAssemblyVersionsDeserializationBinder();
                yourType = (YourType)binFormat.Deserialize(fStream);
            }

改代码关键在于：
typeName = typeName.Replace(“oldnamespace”, “newnamespace”);

如果不加这个可能会提示 找不到xxx程序集，这个程序集是你自己写的程序，也有可能出现
System.Runtime.Serialization.SerializationException:“无法加载进行反序列化所需的类型 yournamespace.yourtype。”