diff --git a/shared/Microsoft.Extensions.PropertyHelper.Sources/PropertyHelper.cs b/shared/Microsoft.Extensions.PropertyHelper.Sources/PropertyHelper.cs
index 74d3563e..27ba5661 100644
--- a/shared/Microsoft.Extensions.PropertyHelper.Sources/PropertyHelper.cs
+++ b/shared/Microsoft.Extensions.PropertyHelper.Sources/PropertyHelper.cs
@@ -327,7 +327,7 @@ public static Action<object, object> MakeFastPropertySetter(PropertyInfo propert
         /// </summary>
         /// <remarks>
         /// The implementation of PropertyHelper will cache the property accessors per-type. This is
-        /// faster when the the same type is used multiple times with ObjectToDictionary.
+        /// faster when the same type is used multiple times with ObjectToDictionary.
         /// </remarks>
         public static IDictionary<string, object> ObjectToDictionary(object value)
         {
@@ -453,7 +453,7 @@ protected static PropertyHelper[] GetVisibleProperties(
                 // the type to see if we should include it.
                 var ignoreProperty = false;
 
-                // Walk up the hierarchy until we find the type that actally declares this
+                // Walk up the hierarchy until we find the type that actually declares this
                 // PropertyInfo.
                 var currentTypeInfo = type.GetTypeInfo();
                 var declaringTypeInfo = declaringType.GetTypeInfo();
@@ -514,7 +514,7 @@ protected static PropertyHelper[] GetProperties(
         // Indexed properties are not useful (or valid) for grabbing properties off an object.
         private static bool IsInterestingProperty(PropertyInfo property)
         {
-            // For imporving application startup time, do not use GetIndexParameters() api early in this check as it
+            // For improving application startup time, do not use GetIndexParameters() api early in this check as it
             // creates a copy of parameter array and also we would like to check for the presence of a get method
             // and short circuit asap.
             return property.GetMethod != null &&
diff --git a/shared/Microsoft.Extensions.StackTrace.Sources/StackFrame/StackFrameSourceCodeInfo.cs b/shared/Microsoft.Extensions.StackTrace.Sources/StackFrame/StackFrameSourceCodeInfo.cs
index 6159adcb..2932e083 100644
--- a/shared/Microsoft.Extensions.StackTrace.Sources/StackFrame/StackFrameSourceCodeInfo.cs
+++ b/shared/Microsoft.Extensions.StackTrace.Sources/StackFrame/StackFrameSourceCodeInfo.cs
@@ -27,7 +27,7 @@ internal class StackFrameSourceCodeInfo
         public int Line { get; set; }
 
         /// <summary>
-        /// The line preceeding the frame line
+        /// The line preceding the frame line
         /// </summary>
         public int PreContextLine { get; set; }
 
diff --git a/src/Microsoft.Extensions.Primitives/ChangeToken.cs b/src/Microsoft.Extensions.Primitives/ChangeToken.cs
index 30ddbb99..ed722475 100644
--- a/src/Microsoft.Extensions.Primitives/ChangeToken.cs
+++ b/src/Microsoft.Extensions.Primitives/ChangeToken.cs
@@ -6,7 +6,7 @@
 namespace Microsoft.Extensions.Primitives
 {
     /// <summary>
-    /// Propagates notifications that a change has occured.
+    /// Propagates notifications that a change has occurred.
     /// </summary>
     public static class ChangeToken
     {
diff --git a/src/Microsoft.Extensions.Primitives/IChangeToken.cs b/src/Microsoft.Extensions.Primitives/IChangeToken.cs
index c03c8d3f..357447fc 100644
--- a/src/Microsoft.Extensions.Primitives/IChangeToken.cs
+++ b/src/Microsoft.Extensions.Primitives/IChangeToken.cs
@@ -6,12 +6,12 @@
 namespace Microsoft.Extensions.Primitives
 {
     /// <summary>
-    /// Propagates notifications that a change has occured.
+    /// Propagates notifications that a change has occurred.
     /// </summary>
     public interface IChangeToken
     {
         /// <summary>
-        /// Gets a value that indicates if a change has occured.
+        /// Gets a value that indicates if a change has occurred.
         /// </summary>
         bool HasChanged { get; }