Generate Stronger Random Numbers using C# and VB.NET

The RNGCryptoServiceProvider Class implements a cryptographic Random Number Generator (RNG) using the implementation provided by the cryptographic service provider (CSP). Here’s how to generate random numbers using this class. Make sure you import the System.Security.Cryptography namespace before using this sample code

C#

static void GenerateRandomNumber()
{
    byte[] byt = new byte[4];
    RNGCryptoServiceProvider rngCrypto =
        new RNGCryptoServiceProvider();
    rngCrypto.GetBytes(byt);
    int randomNumber = BitConverter.ToInt32(byt, 0);
    Console.WriteLine(randomNumber);
}

VB.NET

Shared Sub GenerateRandomNumber()
    Dim byt As Byte() = New Byte(4) {}
    Dim rngCrypto As New RNGCryptoServiceProvider()
    rngCrypto.GetBytes(byt)
    Dim randomNumber As Integer = BitConverter.ToInt32(byt, 0)
    Console.WriteLine(randomNumber)
End Sub

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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