diff --git a/xml/System.Collections.Immutable/ImmutableDictionary`2+Builder.xml b/xml/System.Collections.Immutable/ImmutableDictionary`2+Builder.xml
index 6b559f579c5..6f6152a4ff9 100644
--- a/xml/System.Collections.Immutable/ImmutableDictionary`2+Builder.xml
+++ b/xml/System.Collections.Immutable/ImmutableDictionary`2+Builder.xml
@@ -700,8 +700,9 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets a value that indicates whether the collection is read-only.</summary>
+        <value>
+          <see langword="true" /> if the collection is read-only; otherwise, <see langword="false" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -730,8 +731,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TKey&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets a collection containing the keys of the generic dictionary.</summary>
+        <value>A collection containing the keys of the object that implements the generic dictionary.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -760,8 +761,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TValue&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets a collection containing the values in the generic dictionary.</summary>
+        <value>A collection containing the values in the object that implements the generic dictionary.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -790,8 +791,8 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Returns an enumerator that iterates through the collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/System.Collections.Immutable/ImmutableDictionary`2.xml b/xml/System.Collections.Immutable/ImmutableDictionary`2.xml
index fe7f6ffb75f..95e72ec2529 100644
--- a/xml/System.Collections.Immutable/ImmutableDictionary`2.xml
+++ b/xml/System.Collections.Immutable/ImmutableDictionary`2.xml
@@ -816,9 +816,9 @@
         <Parameter Name="value" Type="TValue" />
       </Parameters>
       <Docs>
-        <param name="key">To be added.</param>
-        <param name="value">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="key">The object to use as the key of the element to add.</param>
+        <param name="value">The object to use as the value of the element to add.</param>
+        <summary>Adds an element with the provided key and value to the immutable dictionary.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -850,9 +850,9 @@
         <Parameter Name="key" Type="TKey" />
       </Parameters>
       <Docs>
-        <param name="key">To be added.</param>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <param name="key">The type of the key.</param>
+        <summary>Gets or sets the <typeparamref name="TValue" /> with the specified key.</summary>
+        <value>An object of type <typeparamref name="TValue" /> associated with the <paramref name="key" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -881,8 +881,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TKey&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the keys.</summary>
+        <value>A collection containing the keys.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -913,9 +913,10 @@
         <Parameter Name="key" Type="TKey" />
       </Parameters>
       <Docs>
-        <param name="key">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="key">The key of the element to remove.</param>
+        <summary>Removes the element with the specified key from the generic dictionary.</summary>
+        <returns>
+          <see langword="true" /> if the element is successfully removed; otherwise, <see langword="false" />.  This method also returns <see langword="false" /> if <paramref name="key" /> was not found in the original generic dictionary.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -944,8 +945,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TValue&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the values.</summary>
+        <value>A collection containing the values.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -974,8 +975,8 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Returns an enumerator that iterates through the collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1571,8 +1572,8 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Retrieves an empty dictionary that has the same ordering and key-value comparison rules as this dictionary instance.</summary>
+        <returns>The immutable dictionary instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1704,9 +1705,9 @@
         <Parameter Name="items" Type="System.Collections.Generic.IEnumerable&lt;System.Collections.Generic.KeyValuePair&lt;TKey,TValue&gt;&gt;" />
       </Parameters>
       <Docs>
-        <param name="items">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="items">The key-value pairs to set on the map. Any keys that conflict with existing keys will replace the previous values.</param>
+        <summary>Applies a given set of key-value pairs to an immutable dictionary, replacing any conflicting keys in the resulting dictionary.</summary>
+        <returns>A copy of the immutable dictionary with updated key-value pairs.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/System.Collections.Immutable/ImmutableSortedDictionary`2+Builder.xml b/xml/System.Collections.Immutable/ImmutableSortedDictionary`2+Builder.xml
index 4c750f9892d..6af268bfd9b 100644
--- a/xml/System.Collections.Immutable/ImmutableSortedDictionary`2+Builder.xml
+++ b/xml/System.Collections.Immutable/ImmutableSortedDictionary`2+Builder.xml
@@ -676,8 +676,8 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets a value that indicates whether this instance is read-only.</summary>
+        <value>Always <see langword="false" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
diff --git a/xml/System.Collections.Immutable/ImmutableSortedDictionary`2.xml b/xml/System.Collections.Immutable/ImmutableSortedDictionary`2.xml
index 26725ba47e2..e84dc85b44d 100644
--- a/xml/System.Collections.Immutable/ImmutableSortedDictionary`2.xml
+++ b/xml/System.Collections.Immutable/ImmutableSortedDictionary`2.xml
@@ -798,9 +798,9 @@
         <Parameter Name="value" Type="TValue" />
       </Parameters>
       <Docs>
-        <param name="key">To be added.</param>
-        <param name="value">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="key">The object to use as the key of the element to add.</param>
+        <param name="value">The object to use as the value of the element to add.</param>
+        <summary>Adds an element with the provided key and value to the generic dictionary.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -833,8 +833,8 @@
       </Parameters>
       <Docs>
         <param name="key">To be added.</param>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets or sets the <typeparamref name="TValue" /> with the specified key.</summary>
+        <value>An object of type <typeparamref name="TValue" /> associated with the <paramref name="key" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -863,8 +863,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TKey&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the keys.</summary>
+        <value>A collection containing the keys.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -895,9 +895,10 @@
         <Parameter Name="key" Type="TKey" />
       </Parameters>
       <Docs>
-        <param name="key">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="key">The key of the element to remove.</param>
+        <summary>Removes the element with the specified key from the generic dictionary.</summary>
+        <returns>
+          <see langword="true" /> if the element is successfully removed; otherwise, <see langword="false" />.  This method also returns <see langword="false" /> if <paramref name="key" /> was not found in the original generic dictionary.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -926,8 +927,8 @@
         <ReturnType>System.Collections.Generic.ICollection&lt;TValue&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets the values.</summary>
+        <value>A collection containing the values.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -956,8 +957,8 @@
       </ReturnValue>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <summary>Returns an enumerator that iterates through the collection.</summary>
+        <returns>An enumerator that can be used to iterate through the collection.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1491,7 +1492,7 @@
         <param name="key">To be added.</param>
         <param name="value">To be added.</param>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1524,7 +1525,7 @@
       <Docs>
         <param name="pairs">To be added.</param>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1554,7 +1555,7 @@
       <Parameters />
       <Docs>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1587,7 +1588,7 @@
       <Docs>
         <param name="key">To be added.</param>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1620,7 +1621,7 @@
       <Docs>
         <param name="keys">To be added.</param>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1655,7 +1656,7 @@
         <param name="key">To be added.</param>
         <param name="value">To be added.</param>
         <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1686,9 +1687,9 @@
         <Parameter Name="items" Type="System.Collections.Generic.IEnumerable&lt;System.Collections.Generic.KeyValuePair&lt;TKey,TValue&gt;&gt;" />
       </Parameters>
       <Docs>
-        <param name="items">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="items">A set of key-value pairs to set on the map.</param>
+        <summary>Applies a given set of key-value pairs to an immutable dictionary, replacing any conflicting keys in the resulting dictionary.</summary>
+        <returns>The <see cref="T:System.Collections.Immutable.IImmutableDictionary`2" /> instance.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>