A CAML Query to SharePoint query returns the entire set

Question

I have a problem where, if I execute a CAML request in C #, my ListItemCollection contains the entire list. Here is a snippet of my cleared code, maybe you can see what I did wrong. During debugging, I discovered that the generated XML is what I expected with the values ​​read from the file. There seems to be a problem with actually executing the query and loading the results. The steps that I took to do it here seem wrong to me, I feel that I am missing a step.

using Microsoft.SharePoint.Client;
...
System.Net.NetworkCredential credentials = new System.Net.NetworkCredential(user, password, domain);
ClientContext clientContext = new ClientContext(uri);
clientContext.Credentials = credentials;
List list = clientContext.Web.Lists.GetByTitle(listName);
//read line of input from file and save to string[]
CamlQuery camlQuery = new CamlQuery();
camlQuery.ViewXml = "<Query><Where><And><Eq><FieldRef Name=\"Entity\" /><Value Type=\"Text\">" + columns[2].Trim() + "</Value></Eq><And><Eq><FieldRef Name=\"Title\"/><Value Type=\"Text\">" + columns[0].Trim() + "</Value></Eq><Eq><FieldRef Name=\"Section\" /><Value Type=\"Text\">" + columns[1].Trim() + "</Value></Eq></And></And></Where></Query>";
ListItemCollection listItems = list.GetItems(camlQuery);
clientContext.Load(listItems);
clientContext.ExecuteQuery();

Answer 1

SharePoint CSOM CamlQuery.ViewXml <View>, :

public CamlQuery CreateInventoryQuery(string searchSku)
{
   var qry = new CamlQuery();
   qry.ViewXml =
      @"<View>
         <Query>
          <Where>
            <BeginsWith>
              <FieldRef Name='SKU' />
              <Value Type='Text'>" + searchSku + @"</Value>
            </BeginsWith>
          </Where>
        </Query>
       </View>";
   return qry;
}

Answer 2

, , CAML. -, XML VIEW, . - - .

camlQuery.ViewXml = "<View><Query><Where><And><Eq><FieldRef Name=\"Entity\" /><Value Type=\"Text\">" + columns[2].Trim() + "</Value></Eq><And><Eq><FieldRef Name=\"Title\"/><Value Type=\"Text\">" + columns[0].Trim() + "</Value></Eq><Eq><FieldRef Name=\"Section\" /><Value Type=\"Text\">" + columns[1].Trim() + "</Value></Eq></And></And></Where></Query></View>";