查找.txt

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DataColumn[]keys=new DataColumn[1];
			keys[0]=thisDataSet.Tables["Intro"].Columns["ID"];
			thisDataSet.Tables["Intro"].PrimaryKey=keys;
			DataRow findRow=thisDataSet.Tables["Intro"].Rows.Find("2");
			if(findRow==null)
			{
				Console.WriteLine("Not found");
			}
			else
			{
				Console.WriteLine("Aleady!");
			}