diff --git a/web/Areas/CMS/Data/CMS.cs b/web/Areas/CMS/Data/CMS.cs
index 6e0aeedc0..cc0b12e3b 100644
--- a/web/Areas/CMS/Data/CMS.cs
+++ b/web/Areas/CMS/Data/CMS.cs
@@ -628,7 +628,7 @@ public byte[] DecryptFile(byte[] encryptedData, string keystring)
         {
             byte[] secretkey = GetSecretKey(keystring);
 
-            Aes aes = Aes.Create();
+            using Aes aes = Aes.Create();
             aes.Mode = CipherMode.ECB;
 
             using var ms = new MemoryStream();
@@ -653,13 +653,13 @@ public byte[] DecryptFile(byte[] encryptedData, string keystring)
         public string DecryptAES(string encryptedString, string Key)
         {
             //First write to memory
-            MemoryStream mmsStream = new();
-            StreamWriter srwTemp = new(mmsStream);
+            using MemoryStream mmsStream = new();
+            using StreamWriter srwTemp = new(mmsStream);
             srwTemp.Write(encryptedString);
             srwTemp.Flush();
             mmsStream.Position = 0;
 
-            MemoryStream outstream = new();
+            using MemoryStream outstream = new();
 
             //CallingUUDecode
             Codecs.UUDecode(mmsStream, outstream);
diff --git a/web/Areas/Computing/Services/BiorenderStudentLookup.cs b/web/Areas/Computing/Services/BiorenderStudentLookup.cs
index 5d6d3e93a..5aaaa8800 100644
--- a/web/Areas/Computing/Services/BiorenderStudentLookup.cs
+++ b/web/Areas/Computing/Services/BiorenderStudentLookup.cs
@@ -19,7 +19,7 @@ public BiorenderStudentLookup(IamApi iamapi)
         public async Task<List<BiorenderStudent>> GetBiorenderStudentInfo(List<string> emails)
         {
             List<Task<BiorenderStudent>> resultList = new();
-            var throttler = new SemaphoreSlim(initialCount: 20);
+            using var throttler = new SemaphoreSlim(initialCount: 20);
             foreach (var email in emails)
             {
                 await throttler.WaitAsync();
diff --git a/web/Areas/Effort/Services/DeptSummaryService.cs b/web/Areas/Effort/Services/DeptSummaryService.cs
index f30b4dceb..c7e1e2b93 100644
--- a/web/Areas/Effort/Services/DeptSummaryService.cs
+++ b/web/Areas/Effort/Services/DeptSummaryService.cs
@@ -310,7 +310,7 @@ public Task<byte[]> GenerateReportPdfAsync(DeptSummaryReport report)
 
     public MemoryStream GenerateReportExcel(DeptSummaryReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Department Summary Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -428,7 +428,6 @@ public MemoryStream GenerateReportExcel(DeptSummaryReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/EvaluationReportService.cs b/web/Areas/Effort/Services/EvaluationReportService.cs
index becc519e2..8992dba37 100644
--- a/web/Areas/Effort/Services/EvaluationReportService.cs
+++ b/web/Areas/Effort/Services/EvaluationReportService.cs
@@ -681,7 +681,7 @@ public Task<byte[]> GenerateDetailPdfAsync(EvalDetailReport report)
 
     public MemoryStream GenerateEvalSummaryExcel(EvalSummaryReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Eval Summary Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -735,14 +735,13 @@ public MemoryStream GenerateEvalSummaryExcel(EvalSummaryReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
 
     public MemoryStream GenerateEvalDetailExcel(EvalDetailReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Eval Detail Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -819,7 +818,6 @@ public MemoryStream GenerateEvalDetailExcel(EvalDetailReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/MeritMultiYearService.cs b/web/Areas/Effort/Services/MeritMultiYearService.cs
index d436c28d5..082a5fbdd 100644
--- a/web/Areas/Effort/Services/MeritMultiYearService.cs
+++ b/web/Areas/Effort/Services/MeritMultiYearService.cs
@@ -1261,7 +1261,7 @@ public Task<byte[]> GenerateReportPdfAsync(MultiYearReport report)
 
     public MemoryStream GenerateReportExcel(MultiYearReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Merit & Promotion Report - Multi-Year";
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
             subject: $"Multi-year merit and evaluation summary for {report.Instructor}");
@@ -1494,7 +1494,6 @@ public MemoryStream GenerateReportExcel(MultiYearReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/MeritReportService.cs b/web/Areas/Effort/Services/MeritReportService.cs
index b3a163fdb..3742430c9 100644
--- a/web/Areas/Effort/Services/MeritReportService.cs
+++ b/web/Areas/Effort/Services/MeritReportService.cs
@@ -918,7 +918,7 @@ public Task<byte[]> GenerateMeritAveragePdfAsync(MeritAverageReport report)
 
     public MemoryStream GenerateMeritDetailExcel(MeritDetailReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Merit & Promotion Detail Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -1017,14 +1017,13 @@ public MemoryStream GenerateMeritDetailExcel(MeritDetailReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
 
     public MemoryStream GenerateMeritAverageExcel(MeritAverageReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Merit & Promotion Average Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -1163,7 +1162,6 @@ public MemoryStream GenerateMeritAverageExcel(MeritAverageReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/MeritSummaryService.cs b/web/Areas/Effort/Services/MeritSummaryService.cs
index e8f3e7045..5817b7e35 100644
--- a/web/Areas/Effort/Services/MeritSummaryService.cs
+++ b/web/Areas/Effort/Services/MeritSummaryService.cs
@@ -368,7 +368,7 @@ public Task<byte[]> GenerateReportPdfAsync(MeritSummaryReport report)
 
     public MemoryStream GenerateReportExcel(MeritSummaryReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Merit & Promotion Summary Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -456,7 +456,6 @@ public MemoryStream GenerateReportExcel(MeritSummaryReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/SchoolSummaryService.cs b/web/Areas/Effort/Services/SchoolSummaryService.cs
index fc605fe3f..f22771ca8 100644
--- a/web/Areas/Effort/Services/SchoolSummaryService.cs
+++ b/web/Areas/Effort/Services/SchoolSummaryService.cs
@@ -339,7 +339,7 @@ public Task<byte[]> GenerateReportPdfAsync(SchoolSummaryReport report)
 
     public MemoryStream GenerateReportExcel(SchoolSummaryReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "School Summary Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -480,7 +480,6 @@ public MemoryStream GenerateReportExcel(SchoolSummaryReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Areas/Effort/Services/TeachingActivityService.cs b/web/Areas/Effort/Services/TeachingActivityService.cs
index 538122279..043533010 100644
--- a/web/Areas/Effort/Services/TeachingActivityService.cs
+++ b/web/Areas/Effort/Services/TeachingActivityService.cs
@@ -485,7 +485,7 @@ public Task<byte[]> GenerateIndividualReportPdfAsync(TeachingActivityReport repo
 
     public MemoryStream GenerateReportExcel(TeachingActivityReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Teaching Activity Report";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -596,14 +596,13 @@ public MemoryStream GenerateReportExcel(TeachingActivityReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
 
     public MemoryStream GenerateIndividualReportExcel(TeachingActivityReport report)
     {
-        var wb = new XLWorkbook();
+        using var wb = new XLWorkbook();
         const string reportTitle = "Teaching Activity Report (Individual)";
         var termName = report.AcademicYear ?? report.TermName;
         ExcelAccessibilityHelper.SetCoreProperties(wb, reportTitle,
@@ -694,7 +693,6 @@ public MemoryStream GenerateIndividualReportExcel(TeachingActivityReport report)
 
         var stream = new MemoryStream();
         wb.SaveAs(stream);
-        wb.Dispose();
         stream.Position = 0;
         return stream;
     }
diff --git a/web/Classes/Utilities/F5HttpRequest.cs b/web/Classes/Utilities/F5HttpRequest.cs
index 147a30e8f..ea87b0d4c 100644
--- a/web/Classes/Utilities/F5HttpRequest.cs
+++ b/web/Classes/Utilities/F5HttpRequest.cs
@@ -41,11 +41,9 @@ public async Task<HttpResponseMessage> Send(HttpRequestMessage request, int atte
             if (request.Method != HttpMethod.Get && attemptNumber == 0)
             {
                 //Try a send to the original url, with a get and empty body.
-                HttpRequestMessage newRequest = new()
-                {
-                    RequestUri = request.RequestUri,
-                    Method = HttpMethod.Get
-                };
+                using HttpRequestMessage newRequest = new();
+                newRequest.RequestUri = request.RequestUri;
+                newRequest.Method = HttpMethod.Get;
 
                 //don't care about the response
                 await Send(newRequest);