<PackageReference Include="System.Configuration.ConfigurationManager" Version="10.0.0" />

System.Configuration.ConnectionStringSettings

Represents a single, named connection string in the connection strings configuration file section.
namespace System.Configuration { public sealed class ConnectionStringSettings : ConfigurationElement { public string Name { get; set; } public string ConnectionString { get; set; } public string ProviderName { get; set; } public ConnectionStringSettings(); public ConnectionStringSettings(string name, string connectionString); public ConnectionStringSettings(string name, string connectionString, string providerName); } }