how to validate the null value in dictionary in c#

Question

My code as follows   id     Name     farmdetailsdata 1     Test1     {"Product1":"A","Product2":"B"} 2     Test2 3     Test3     {"Product3":"C","Product2":"D"} 4     Test4     {"Product4":"C","Product5":"D"}   int columnindex = 43; List lst = new List (); foreach (DataRow row in dtFarmerFarmReports.Rows) { var dict = JsonConvert.DeserializeObject >(row["farm_detailsdata"].ToString()); }   from the above code how to validate dict is null or empty.   becuase in the above table for the ID 2 farmdetailsdata value is empty.   from the above code how to validate dict is null or empty.

Faisal Pathan · Answer

//Obj_Dictionary is a Dictionary  that contains parameters that will be passed to a query.       public   string  GetIfValid( string  fieldName)   {        if  (Obj_Dictionary.ContainsKey(fieldName)            && Obj_Dictionary[fieldName] !=  null             && ! string .IsNullOrEmpty(Obj_Dictionary[fieldName].ToString())           )        {            return  Obj_Dictionary[fieldName].ToString();       }           return   string .Empty;   }      //And you can use like this        string  Test = GetValue( "Test" );