Type conversion in expression for NVARCHAR(200) may affect SeekPlan in query plan choice
<blockquote>
  <p>Type conversion in expression
  (isnull([Employee].[EmployeeCode],[@Code])=CONVERT_IMPLICIT(nvarchar(200),[name], 0)) may affect "SeekPlan" in query plan choice</p>
</blockquote>

<p><code>@Code</code> and <code>[Employee].[EmployeeCode]</code> are both of type <code>nvarchar(200)</code>.</p>

<p>How can we remove this warning message from the SQL Server execution plan?</p>