connection pooling

MainApp/MainApp/AdoClient.cs

@@ -15,10 +15,13 @@ namespace MainApp
 		private string connString;
 		private SqlConnection conn;
 
+		private const int MIN_POOL_SIZE = 20;
+		private const int MAX_POOL_SIZE = 100;
+		private const int TIMEOUT = 15; // sec
 
 		public bool SetConnection(string server, string database, string uid, string password)
 		{
-			connString = $"server={server}; database={database}; uid={uid}; pwd={password};";
+			connString = $"server={server}; database={database}; uid={uid}; pwd={password}; min pool size = {MIN_POOL_SIZE}; max pool size = {MAX_POOL_SIZE}; connection timeout = {TIMEOUT};";
 
 			using (conn = new SqlConnection(connString))
 			{