Encrypting & Decrypting a String in C# [duplicate]

Answer 1

If you are targeting ASP.NET Core that does not support RijndaelManaged yet, you can use IDataProtectionProvider.

First, configure your application to use data protection:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDataProtection();
    }
    // ...
}

Then you'll be able to inject IDataProtectionProvider instance and use it to encrypt/decrypt data:

public class MyService : IService
{
    private const string Purpose = "my protection purpose";
    private readonly IDataProtectionProvider _provider;

    public MyService(IDataProtectionProvider provider)
    {
        _provider = provider;
    }

    public string Encrypt(string plainText)
    {
        var protector = _provider.CreateProtector(Purpose);
        return protector.Protect(plainText);
    }

    public string Decrypt(string cipherText)
    {
        var protector = _provider.CreateProtector(Purpose);
        return protector.Unprotect(cipherText);
    }
}

See this article for more details.