<PackageReference Include="NETStandard.Library" Version="2.0.0-preview2-25401-01" />

System.Security.Cryptography.ToBase64Transform

namespace System.Security.Cryptography { public class ToBase64Transform : IDisposable, ICryptoTransform { public virtual bool CanReuseTransform { get; } public bool CanTransformMultipleBlocks { get; } public int InputBlockSize { get; } public int OutputBlockSize { get; } public ToBase64Transform(); public void Clear(); public void Dispose(); protected virtual void Dispose(bool disposing); public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset); public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount); } }