var userName = "user 1";
var user = context.Users.FromSql($"select top 1 * from Users where name = {userName} ").FirstOrDefault();
if (user != null)
{
   Console.WriteLine(user.Name);
}

SELECT TOP(1) [u].[UserId], [u].[IsAdmin], [u].[Name]
FROM (
    select top 1 * from Users where name = @p0
) AS [u]

var sql = $"select top 1 * from Users where name = {userName} ";
user = context.Users.FromSql(sql).FirstOrDefault();
if (user != null)
{
   Console.WriteLine(user.Name);
}

 .SqlException: Incorrect syntax near '1'

 public static IQueryable<TEntity> FromSql<TEntity>(this IQueryable<TEntity> source, FormattableString sql) where TEntity : class;

 var sql = $"select top 1 * from Users where name = '{userName}' ";

SELECT TOP(1) [u].[UserId], [u].[IsAdmin], [u].[Name]
FROM (
   select top 1 * from Users where name = 'user 1'
) AS [u]

"addDate": {
       type: "string", // use "date" if you want to use the built-in datapicker
       validation: { required: true }
}

filterable: {
                     ui: function(element) {
                     var name = $(element[0]).data("bind").replace("[","").replace("]","").replace(".","").replace(" ","").replace(":","");
                     $(element[0])
                                  .addClass("k-input k-textbox")
                                  .attr("style", "width:100%")
                                  .attr("data-mddatetimepicker", "true")
                                  .attr("data-englishnumber", "true")
                                  .attr("data-trigger", "click")
                                  .attr("data-targetselector", "#" + name)
                                  .attr("data-fromdate", "true")
                                  .attr("data-enabletimepicker", "false")
                                  .attr("data-placement", "right")
                                  .attr("name", name)
                                  .attr("id", name);
                                EnableMdDateTimePickers();
                            }
                        }

                filter: function(args) {
                    console.log(args);
                    if(args.field === "addDate") {
                        for(var i = 0; i < args.filter.filters.length; i++) {
                            var filterValue = args.filter.filters[i].value;
                            if(filterValue) {
                               args.filter.filters[i].value = moment(filterValue, 'jYYYY/jMM/jDD').format('YYYY-MM-DD');
                            }
                        }
                    }
                },