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I have using two where condition in my query
If you open your query in LinqPad you will see that both queries
dbContext.Projects.Where(p=>p.ProjectId!=ProjectId).Where(p=>p.Name==Name)
dbContext.Projects.Where(p=>p.ProjectId!=ProjectId && p.Name==Name);
will result both in
SELECT [...]
FROM [...]
WHERE p.ProjectId <> someId AND p.Name = 'something'
There is no difference neither in performance nor in SQL query structure.