public override int GetHashCode()
        {
            var hashCode = -1869096446;

            hashCode = hashCode * -1521134295 + DirDiff.GetHashCode();
            hashCode = hashCode * -1521134295 + EqualityComparer <string> .Default.GetHashCode(ToolName);

            hashCode = hashCode * -1521134295 + EqualityComparer <string> .Default.GetHashCode(LeftSHA);

            hashCode = hashCode * -1521134295 + EqualityComparer <string> .Default.GetHashCode(RightSHA);

            return(hashCode);
        }