SQL search query not showing correct result - sql-server

Question

I am trying to create a stored procedure which searches employees from the table employee.
My query looks like this
ALTER PROCEDURE [dbo].[EmployeeList]
#CurrentPageNo INT = null,
#PageSize INT = 5,
#FirstName VARCHAR(100),
#Email VARCHAR(100),
#DeptId int = null
AS
BEGIN
DECLARE #StartRecordNo INT, #EndRecordNo INT
IF #CurrentPageNo IS NULL
SET #CurrentPageNo = 1
SET #StartRecordNo = ((#CurrentPageNo - 1) * #PageSize)
SET #EndRecordNo = #StartRecordNo + #PageSize
SELECT
ROW_NUMBER() OVER (ORDER BY CreatedByDate desc) As srno,
EmployeeID, FirstName, LastName, Email, DateOfBirth, Joining,
MobileNumber, MonthsOfExperience, TotalExperience, DepartmentName
FROM
Employee
INNER JOIN
Department ON Employee.DeptId = Department.DepartmentID
WHERE
(ISNULL(#FirstName, '') = '' OR Employee.FirstName LIKE '%' + FirstName + '%')
AND
(ISNULL(#Email, '') = '' OR Employee.Email LIKE '%' + #Email + '%')
AND
(#DeptId IS NULL OR Employee.DeptId = #DeptId)
END
The procedure is compiled successfully. but when execute it like
exec EmployeeList 1,10,'shaili','',null
It shows other records too. Can anyone explain this? I want only the record with the given name.
Result I got:

Answer 1

#Siddhant only little mistake by you. i.e you pass FirstName instead of #FirstName. check below code.
ALTER PROCEDURE [dbo].[Test_EmployeeList]
#CurrentPageNo INT = null,
#PageSize INT=5,
#FirstName VARCHAR(100),
#Email VARCHAR(100),
#DeptId int = null
AS
BEGIN
DECLARE #StartRecordNo INT,#EndRecordNo INT
IF #CurrentPageNo IS NULL
SET #CurrentPageNo=1
SET #StartRecordNo=((#CurrentPageNo-1) * #PageSize)
SET #EndRecordNo=#StartRecordNo + #PageSize
SELECT ROW_NUMBER()OVER(ORDER BY Reg_Date desc) As srno,
F_Name, L_Name, Email, Mobile, Reg_Date from tbl_LoginMaster
inner join tbl_Login_Detail
ON tbl_LoginMaster.User_Id = tbl_Login_Detail.User_Id
WHERE (ISNULL(#FirstName,'')='' OR tbl_LoginMaster.F_Name LIKE '%'+#FirstName+'%') AND
(ISNULL(#Email,'')='' OR tbl_LoginMaster.Email LIKE '%'+#Email+'%') AND
(#DeptId is null OR tbl_LoginMaster.User_Id = #DeptId )
END
GO
exec Test_EmployeeList 1,10,'Mohit','',null