<PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.1" />

EnvironmentVariablesExtensions

public static class EnvironmentVariablesExtensions
Provides extension methods for registering EnvironmentVariablesConfigurationProvider with IConfigurationBuilder.
public static IConfigurationBuilder AddEnvironmentVariables(this IConfigurationBuilder configurationBuilder)

Adds an IConfigurationProvider that reads configuration values from environment variables.

public static IConfigurationBuilder AddEnvironmentVariables(this IConfigurationBuilder configurationBuilder, string prefix)

Adds an IConfigurationProvider that reads configuration values from environment variables with a specified prefix.

Adds an IConfigurationProvider that reads configuration values from environment variables.