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Output Constraint Properties

using System; using System.Data;     class Program     {         static void Main(string[] args)         {             DataTable dt = new DataTable("Table-1");             dt.Columns.Add("Id", typeof(int));             dt.Columns.Add("Field1", typeof(string)).MaxLength = 50;             UniqueConstraint uc1 = new UniqueConstraint("UniqueConstraint", dt.Columns["Field1"]);             dt.Constraints.Add(uc1);             OutputConstraintProperties(dt);         }         private static void OutputConstraintProperties(DataTable dt)         {             Console.WriteLine(dt.TableName);             Console.WriteLine(dt.Constraints[0].ConstraintName);             Console.WriteLine(((UniqueConstraint)dt.Constraints[0]).IsPrimaryKey);             foreach (DataColumn col in ((UniqueConstraint)dt.Constraints[0]).Columns)             {                 Console.WriteLine(col.ColumnName);             }         }     }