Handles the management of mesh resources.
Inheritance: ResourceManager
 /// <summary>
 ///     Internal constructor.  This class cannot be instantiated externally.
 /// </summary>
 protected internal MeshManager()
 {
     if (instance == null)
     {
         instance = this;
     }
 }
 /// <summary>
 ///     Internal constructor.  This class cannot be instantiated externally.
 /// </summary>
 protected internal MeshManager()
 {
     if (instance == null) {
         instance = this;
     }
 }