To convert Stream to ByteArray in C# and VB.NET you can use the following snippet.

Samples

Sample C#

public static byte[] StreamToByteArray(Stream inputStream)
{
	byte[] bytes = new byte[16384];
	using (MemoryStream memoryStream = new MemoryStream())
	{
		int count;
		while ((count = inputStream.Read(bytes, 0, bytes.Length)) > 0)
		{
			memoryStream.Write(bytes, 0, count);
		}
		return memoryStream.ToArray();
	}
}

Sample VB.NET

Public Function StreamToByteArray(inputStream As Stream) As Byte()
	Dim bytes = New Byte(16383) {}
	Using memoryStream = New MemoryStream()
		Dim count As Integer
		While ((count = inputStream.Read(bytes, 0, bytes.Length)) > 0)
			memoryStream.Write(bytes, 0, count)
		End While
		Return memoryStream.ToArray()
	End Using
End Function

Compatibility: .NET 2.0 .NET 3.0 .NET 3.5 .NET 4.0 .NET 4.5 .NET 4.6

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Related links:

• Stream Class
• Byte Array
• MemoryStream Class
• Stream.Read Method (Byte[], Int32, Int32)
• MemoryStream.ToArray Method ()
• MemoryStream.Write Method (Byte[], Int32, Int32)