<PackageReference Include="System.Security.Permissions" Version="9.0.5" />

SqlClientPermission

public sealed class SqlClientPermission : DBDataPermission
Enables the .NET Framework Data Provider for SQL Server to help make sure that a user has a security level sufficient to access a data source.
using System.Data.Common; using System.Security; using System.Security.Permissions; namespace System.Data.SqlClient { public sealed class SqlClientPermission : DBDataPermission { public SqlClientPermission() : base(PermissionState.None) { } public SqlClientPermission(PermissionState state) : base(PermissionState.None) { } public SqlClientPermission(PermissionState state, bool allowBlankPassword) : base(PermissionState.None) { } public override void Add(string connectionString, string restrictions, KeyRestrictionBehavior behavior) { } public override IPermission Copy() { return null; } } }