C# Grpc Unity无法加载Google.Protobuf的签名

C# Grpc Unity无法加载Google.Protobuf的签名,c#,unity3d,protocol-buffers,grpc,C#,Unity3d,Protocol Buffers,Grpc,我刚下载了unity package grpc的最新版本,但遇到了以下问题: Error: Could not load signature of Google.Protobuf.ByteString:get_Span due to: Could not load file or assembly 'System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dep

我刚下载了unity package grpc的最新版本,但遇到了以下问题:

Error: Could not load signature of Google.Protobuf.ByteString:get_Span due to: Could not load file or assembly 'System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. assembly:System.Memory, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 type:<unknown type> member:(null) signature:<none> Unloading broken assembly Assets/Plugins/Google.Protobuf/lib/net45/Google.Protobuf.dll, this assembly can cause crashes in the runtime
错误:无法加载Google.Protobuf.ByteString:get_Span的签名,原因是:无法加载文件或程序集“System.Memory,Version=4.0.1.0,Culture=neutral,PublicKeyToken=CC7B13FFCD2DD51”或其依赖项之一。程序集:System.Memory,Version=4.0.1.0,Culture=neutral,PublicKeyToken=CC7B13FFCD2DD51类型:成员:(null)签名:卸载损坏的程序集资产/Plugins/Google.Protobuf/lib/net45/Google.Protobuf.dll,此程序集可能导致运行时崩溃
统一版本:2019.3.0f1

有人能解决这个问题吗?非常感谢您的帮助。

这与首先下载3.10.0版无关,然后在unity设置中更改为.net 4.6并重试