Check if SQL string syntax valid.

SQLParser.cs

using Microsoft.SqlServer.TransactSql.ScriptDom;
/// <summary>
/// Install-Package Microsoft.SqlServer.TransactSql.ScriptDom -Version 14.0.3811.
/// </summary>

namespace ApplicationLayout.Areas.RemQuery.Models
{
    public class SQLParser
    {
        public bool IsSQLQueryValid(string sql, out List<string> errors)
        {
            errors = new List<string>();
            TSql140Parser parser = new TSql140Parser(false);
            TSqlFragment fragment;
            IList<ParseError> parseErrors;

            using (TextReader reader = new StringReader(sql))
            {
                fragment = parser.Parse(reader, out parseErrors);
                if (parseErrors != null && parseErrors.Count > 0)
                {
                    errors = parseErrors.Select(e => e.Message).ToList();
                    return false;
                }
            }
            return true;
        }
    }
}