.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

using System;
using System.Reflection;

namespace Samples
{
  public class VersionSample
  {
    public static void Main()
    {
      Type t = Typeof(String);
      Assembly a = Assembly.GetAssembly(t);
      AssemblyName an = a.GetName();
      Version v = an.Version;
      Console.WriteLine("Version: {0}", v);
      Console.WriteLine("Major: {0}", v.Major);
      Console.WriteLine("Minor: {0}", v.Minor);
      Console.WriteLine("Build: {0}", v.Build);
      Console.WriteLine("Revision: {0}", v.Revision);
      v = Environment.Version;
      if(v.Major == 1 && v.Minor == 0)
      {
        Console.WriteLine ("You are running V1");
      }
      else if(v.Major == 1 & v.Minor == 1)
        {
          Console.WriteLine ("You are running V1.1");
        }
        else
          Console.WriteLine ("You are running an unknown version");
    }
  }
}

The output is

 Version: 1.0.3300.0 Major: ...