Singleton design pattern in my asp.net application

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C#

ASP.NET

I have a singleton design pattern in my asp.net application. I have a static ContentStoreCore object.If concurrent users are using the same instance of the class ,Will data mix up occurs?

public static class FactoryClass
{
    private static ContentStoreCore obj = null;
    private static readonly object padLock = new object();

    public static ContentStoreCore GetInstance()
    {
        lock (padLock)
        {
          if (obj == null)
          {
                obj = new ContentStoreCore();
          }
        }
        return obj;
      }
}