diff --git a/eng/build-utils.ps1 b/eng/build-utils.ps1
index 081b99f4024b5ca014280965cdb80277c3d02af9..763c6a0e0cff961af84a8d117bf35b544328bc3a 100644
--- a/eng/build-utils.ps1
+++ b/eng/build-utils.ps1
@@ -119,7 +119,7 @@ function Exec-CommandCore([string]$command, [string]$commandArgs, [switch]$useCo
     }
   }
   finally {
-    # If we didn't finish then an error occured or the user hit ctrl-c.  Either
+    # If we didn't finish then an error occurred or the user hit ctrl-c.  Either
     # way kill the process
     if (-not $finished) {
       $process.Kill()
diff --git a/src/EditorFeatures/Test/EditAndContinue/EditAndContinueWorkspaceServiceTests.cs b/src/EditorFeatures/Test/EditAndContinue/EditAndContinueWorkspaceServiceTests.cs
index 0e223a5e5509f7d36bd6e730914d9a411049f329..e2c2f4dca6fe3292dafdcfa16ef71b3a0a184da5 100644
--- a/src/EditorFeatures/Test/EditAndContinue/EditAndContinueWorkspaceServiceTests.cs
+++ b/src/EditorFeatures/Test/EditAndContinue/EditAndContinueWorkspaceServiceTests.cs
@@ -770,7 +770,7 @@ public async Task BreakMode_ErrorReadingPdbFile()
             var diagnostics = await service.GetDocumentDiagnosticsAsync(document2, CancellationToken.None).ConfigureAwait(false);
             Assert.Empty(diagnostics);
 
-            // an error occured so we need to call update to determine whether we have changes to apply or not:
+            // an error occurred so we need to call update to determine whether we have changes to apply or not:
             Assert.True(await service.HasChangesAsync(sourceFilePath: null, CancellationToken.None).ConfigureAwait(false));
 
             Assert.Empty(_emitDiagnosticsUpdated);
@@ -838,7 +838,7 @@ public async Task BreakMode_ErrorReadingSourceFile()
             var diagnostics = await service.GetDocumentDiagnosticsAsync(document2, CancellationToken.None).ConfigureAwait(false);
             Assert.Empty(diagnostics);
 
-            // an error occured so we need to call update to determine whether we have changes to apply or not:
+            // an error occurred so we need to call update to determine whether we have changes to apply or not:
             Assert.True(await service.HasChangesAsync(sourceFilePath: null, CancellationToken.None).ConfigureAwait(false));
 
             Assert.Empty(_emitDiagnosticsUpdated);
diff --git a/src/Features/Core/Portable/EditAndContinue/CommittedSolution.cs b/src/Features/Core/Portable/EditAndContinue/CommittedSolution.cs
index aaea0a9a0ac3cc5d743a981cd20cba6c5b13ad25..25f680652a4cc17189713b0bac6e9bc1820e98fb 100644
--- a/src/Features/Core/Portable/EditAndContinue/CommittedSolution.cs
+++ b/src/Features/Core/Portable/EditAndContinue/CommittedSolution.cs
@@ -282,7 +282,7 @@ public void CommitSolution(Solution solution)
         /// Returns true if the PDB contains a document record for given <paramref name="sourceFilePath"/>,
         /// in which case <paramref name="checksum"/> and <paramref name="algorithm"/> contain its checksum.
         /// False if the document is not found in the PDB.
-        /// Null if it can't be determined because the PDB is not available or an error occured while reading the PDB.
+        /// Null if it can't be determined because the PDB is not available or an error occurred while reading the PDB.
         /// </summary>
         private bool? TryReadSourceFileChecksumFromPdb(string sourceFilePath, ProjectId projectId, out ImmutableArray<byte> checksum, out SourceHashAlgorithm algorithm)
         {
diff --git a/src/Features/Core/Portable/EditAndContinue/EditAndContinueWorkspaceService.cs b/src/Features/Core/Portable/EditAndContinue/EditAndContinueWorkspaceService.cs
index 1b1f4adc2e8bd5b73e9eb34bb982b967f7c41fef..cf7bf63b5aab8a213a5c82bca1158a0a33d0a705 100644
--- a/src/Features/Core/Portable/EditAndContinue/EditAndContinueWorkspaceService.cs
+++ b/src/Features/Core/Portable/EditAndContinue/EditAndContinueWorkspaceService.cs
@@ -507,7 +507,7 @@ public void DiscardSolutionUpdate()
                 }
 
                 // This method is only called when the EnC is about to apply changes, at which point all active statements and 
-                // their exception regions will be needed. Hence it's not neccessary to scope this query down to just the instruction
+                // their exception regions will be needed. Hence it's not necessary to scope this query down to just the instruction
                 // the debugger is interested at this point while not calculating the others.
 
                 var baseActiveStatements = await editSession.BaseActiveStatements.GetValueAsync(cancellationToken).ConfigureAwait(false);