microservice-tutorial docker-image

Problem encountered on https://dotnet.microsoft.com/en-us/learn/aspnet/microservice-tutorial/docker-image
Operating System: windows

Provide details about the problem you're experiencing. Include your operating system version, exact error message, code sample, and anything else that is relevant.

https://dotnet.microsoft.com/en-us/learn/aspnet/microservice-tutorial/docker-image

docker build -t mymicroservice .
[+] Building 0.4s (9/14)
=> [internal] load build definition from Dockerfile 0.1s
=> => transferring dockerfile: 329B 0.0s
=> [internal] load .dockerignore 0.1s
=> => transferring context: 70B 0.0s
=> [internal] load metadata for mcr.microsoft.com/dotnet/aspnet:6.0 0.2s
=> [internal] load metadata for mcr.microsoft.com/dotnet/sdk:6.0 0.2s
=> [build 1/6] FROM mcr.microsoft.com/dotnet/sdk:6.0@sha256:a3dd4dee05cd1369014244d03b28b602e6a2e1650210dd8633322e00379471ec 0.0s
=> [stage-1 1/3] FROM mcr.microsoft.com/dotnet/aspnet:6.0@sha256:545da8027d0de13ac88716fc380201f05ad9b4834b5b2fd95eadf277e51318a7 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 3.68kB 0.0s
=> CACHED [build 2/6] WORKDIR /src 0.0s
=> ERROR [build 3/6] COPY MyMicroservice.csproj . 0.0s
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> [build 3/6] COPY MyMicroservice.csproj .:
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failed to compute cache key: "/MyMicroservice.csproj" not found: not found