public CustomAttribute(MethodReference constructor)
 {
     this.constructor = constructor;
     this.resolved    = true;
 }
 public CustomAttribute(MethodReference constructor, byte [] blob)
 {
     this.constructor = constructor;
     this.resolved    = false;
     this.blob        = blob;
 }
 internal CustomAttribute(uint signature, MethodReference constructor)
 {
     this.signature   = signature;
     this.constructor = constructor;
     this.resolved    = false;
 }