How to Load a Large File from MS SQL

I have table like this:

CREATE TABLE [dbo].[BigFiles](
	[ID] [uniqueidentifier] NOT NULL,
	[Name] [nvarchar](255) NOT NULL,
	[Size] [bigint] NOT NULL,
	[Data] [image] NULL,
 CONSTRAINT [PK_File] PRIMARY KEY CLUSTERED 
(
	[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

and I inserted some file approx big 700mb:

INSERT INTO [BigFiles] (ID, Name, Size, Data)
SELECT
    NEWID(),
    'bigFile.zip',
    DATALENGTH(BulkColumn),
    BulkColumn
FROM OPENROWSET(BULK N'bigFile.zip', SINGLE_BLOB) AS FileData;

Then I have created 32bit project in Visual Studio, where my csproj looks like this:

<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<OutputType>Exe</OutputType>
		<TargetFramework>net9.0</TargetFramework>
		<ImplicitUsings>enable</ImplicitUsings>
		<Nullable>enable</Nullable>
		<PlatformTarget>x86</PlatformTarget>
		<Prefer32Bit>true</Prefer32Bit>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.2" />
	</ItemGroup>

</Project>

Notice:

<PlatformTarget>x86</PlatformTarget>
<Prefer32Bit>true</Prefer32Bit>

Standard way with Ado.Net will not work:

using Microsoft.Data.SqlClient;

string connectionString = "Server=localhost;Database=saveBigData;User Id=myUserId;Password=myPass;TrustServerCertificate=True;Encrypt=False;";
using SqlConnection sqlConnection = new SqlConnection();
using SqlCommand sqlCommand = new SqlCommand();
sqlConnection.ConnectionString = connectionString;
sqlConnection.Open();
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandText = "SELECT * FROM [dbo].[BigFiles]";
sqlCommand.CommandTimeout = 0;
using SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();

while (sqlDataReader.Read())
{
    object[] values = new object[4];
    sqlDataReader.GetValues(values);
}

In the line:

sqlDataReader.GetValues(values);

will be System.OutOfMemoryException raised. Instead the one should use SequentialAccess:

string fileName = Path.Combine(AppContext.BaseDirectory, $"{Guid.NewGuid()}.bin");

using SqlConnection sqlConnection = new SqlConnection();
using SqlCommand sqlCommand = new SqlCommand();
sqlConnection.ConnectionString = connectionString;
sqlConnection.Open();
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandText = "SELECT * FROM [dbo].[BigFiles]";
sqlCommand.CommandTimeout = 0;
using SqlDataReader reader = sqlCommand.ExecuteReader(CommandBehavior.SequentialAccess);
while (reader.Read())
{
	using Stream sqlStream = reader.GetStream(3);

	using FileStream fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write);
	byte[] buffer = new byte[81920];
	int bytesRead;
	while ((bytesRead = sqlStream.Read(buffer, 0, buffer.Length)) > 0)
	{
		fileStream.Write(buffer, 0, bytesRead);
	}
}

Example download from here.