System.Data.DataColumn.CheckUnique C# (CSharp) Method

        protected void CheckUnique()
        {
            if (!SortIndex.CheckUnique())
            {
                // Throws an exception and the name of any column if its Unique property set to
                // True and non-unique values are found in the column.
                throw ExceptionBuilder.NonUniqueValues(ColumnName);
            }
        }