How to get C# Assembly GUID

How to get C# Assembly GUID using Reflection

public string AssemblyGuidString(System.Reflection.Assembly assembly)
{
  object[] objects =
assembly.GetCustomAttributes(typeof(System.Runtime.InteropServices.GuidAttribute), false);
  if (objects.Length > 0)
 {
   return ((System.Runtime.InteropServices.GuidAttribute)objects[0]).Value;
 }
 else
 {
   return String.Empty;
 }
}

keys: c#, assembly, reflection, guid, attributes