'Info' class not recognized with Swashbuckle and Swagger libraries

Am I missing a package or reference because my AddSwaggerGen method does not compile. My code:

I added using Swashbuckle.AspNetCore.Swagger;

but this code

  services.AddSwaggerGen(c =>
   {
     c.SwaggerDoc("v1", new Info { Title = "My API", Version = "v1" });                 
     c.EnableAnnotations();    
   });

will not compile:

Error CS0246 The type or namespace name 'Info' could not be found (are you missing a using directive or an assembly reference?) Here is the csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DebugType>full</DebugType>
    <DebugSymbols>true</DebugSymbols>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
    <DebugType>full</DebugType>
    <DebugSymbols>true</DebugSymbols>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="IdentityModel" Version="3.10.6" />
    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="5.0.0-rc2" />
    <PackageReference Include="Swashbuckle.AspNetCore.Swagger" Version="5.0.0-rc2" />
    <PackageReference Include="Swashbuckle.AspNetCore.SwaggerGen" Version="5.0.0-rc2" />
    <PackageReference Include="Swashbuckle.AspNetCore.SwaggerUI" Version="5.0.0-rc2" />
  </ItemGroup>