using System;
using System.Text.RegularExpressions;
 
namespace RegExApplication
{
   public class Program
   {
      public static void Main(string[] args)
      {
         string input = "(( {  dbo.Document.MimeType_ID in (select ID from MimeType where Name ='PDF')}   Or  {  dbo.WorkflowItem.CurrentStateName not like 'On_Hold%'} )  And ( {  dbo.DocumentMetaData.Field_ID=74 And  dbo.DocumentMetaData.FieldValue Not like '%test%'}   And  {  dbo.Document.FileName='karan'} ))";
         string pattern = "\\{\\s*([^}]+)\\s*\\}";
         Regex rgx = new Regex(pattern);
 
         Match match = rgx.Match(input);
 
        	while (match.Success)
        	{
            	Console.WriteLine(match.Groups[1].Value);
            	match = match.NextMatch();
        	}
      }
   }
}

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