Query dataset to filter data using LINQ without specifying specefic columns in a Dataset that is filled dynamically

See more:

C#

LINQ

**Case 1**

DataSet oDsParent = new DataSet();
         DataTable odt = new DataTable();
        
         odt.Columns.Add(new DataColumn("DOC_GENO_KEY", typeof(int)));
         odt.Columns.Add(new DataColumn("RESOURCE_TYPE", typeof(string)));
         odt.Columns.Add(new DataColumn("ROUTING_SUB_ID", typeof(int)));
        
         odt.Rows.Add(2, "TEST1", 2);
         odt.Rows.Add(4, "ADMIN", 2);
         odt.Rows.Add(7, "TEST2", 2);
        
         oDsParent.Tables.Add(odt);
         oDsParent.AcceptChanges();
    
        string sTemp =new string ();
         sTemp = "(DOC_GENO_KEY = 4 OR DOC_GENO_KEY = 2) AND (RESOURCE_TYPE = 'TEST1' OR DOC_GENO_KEY = 2 OR ROUTING_SUB_ID = 2)";

 **Case 2**      

     oDsParent = new DataSet();
         odt = new DataTable();
         odt.Columns.Add(new DataColumn("DOCUMENT_ATTACHED", typeof(string)));
         odt.Columns.Add(new DataColumn("ATTACHMENT TYPE", typeof(int)));
        
         odt.Rows.Add("DOC1", 2);
         odt.Rows.Add("DOC2", 1);
         odt.Rows.Add("DOC3", 0);
        
         oDsParent.Tables.Add(odt);
         oDsParent.AcceptChanges();
           
        sTemp = "(DOCUMENT_ATTACHED = 2 OR DOCUMENT_ATTACHED = 1 )";

The dataset oDsParent is formed dynamically
In Case 1 there are 3 columns and their respective data.
In Case 2 there are 2 columns with the data. These columns are filled based on condition in the same dataset(oDsParent) dynamically so that the columns formed are different at each time.

I need to Query the dataset based on the string(sTemp) below which also changes according to the data tables based on the condition.

I cannot use Field <column type="">("Column name") in the query as there are no fixed columns and they change dynamically.

I need a LINQ that can be used generally to filter the dataset no matter which columns are created according to their respective string.

I have created a demo of the dataset and string to understand my issue better.

I used Dataset.Select() method, but because the Query string is too long IIS is crashing and also there are more than 1000 rows in oDsParent.