CookieCollection - update documentation (#4373)

Co-authored-by: Jan Jahoda <[email protected]>

Author: Jan Jahoda

xml/System.Net/CookieCollection.xml

@@ -1004,10 +1004,28 @@ The comparison for <xref:System.Net.Cookie.Path%2A> is case-sensitive.
         <Parameter Name="index" Type="System.Int32" Index="1" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.6" />
       </Parameters>
       <Docs>
-        <param name="array">To be added.</param>
-        <param name="index">To be added.</param>
-        <summary>To be added.</summary>
-        <remarks>To be added.</remarks>
+        <param name="array">The target array to which the <see cref="T:System.Net.CookieCollection" /> will be copied.</param>
+        <param name="index">The zero-based index in the target array where copying begins.</param>
+        <summary>Copies the elements of a <see cref="T:System.Net.CookieCollection" /> to the specified array, starting at a particular index.</summary>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+  
+## Remarks  
+ The <xref:System.Array>`array` parameter must be one-dimensional with zero-based indexing.  
+  
+ ]]></format>
+        </remarks>
+        <exception cref="T:System.ArgumentNullException">
+          <paramref name="array" /> is <see langword="null" />.</exception>
+        <exception cref="T:System.ArgumentOutOfRangeException">
+          <paramref name="index" /> is less than zero.</exception>
+        <exception cref="T:System.ArgumentException">
+          <paramref name="array" /> is multidimensional.  
+  
+ -or-  
+  
+ The number of elements in this <see cref="T:System.Net.CookieCollection" /> is greater than the available space from <paramref name="index" /> to the end of the destination <paramref name="array" />.</exception>
+        <exception cref="T:System.InvalidCastException">The elements in this <see cref="T:System.Net.CookieCollection" /> cannot be cast automatically to the type of the destination <paramref name="array" />.</exception>
       </Docs>
     </Member>
     <Member MemberName="System.Collections.ICollection.IsSynchronized">
@@ -1040,8 +1058,9 @@ The comparison for <xref:System.Net.Cookie.Path%2A> is case-sensitive.
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
+        <summary>Gets a value that indicates whether access to a <see cref="T:System.Net.CookieCollection" /> is thread safe.</summary>
+        <value>
+          <see langword="true" /> if access to the <see cref="T:System.Net.CookieCollection" /> is thread safe; otherwise, <see langword="false" />. The default is <see langword="false" />.</value>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -1075,9 +1094,16 @@ The comparison for <xref:System.Net.Cookie.Path%2A> is case-sensitive.
         <ReturnType>System.Object</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
-        <value>To be added.</value>
-        <remarks>To be added.</remarks>
+        <summary>Gets an object to synchronize access to the <see cref="T:System.Net.CookieCollection" />.</summary>
+        <value>An object to synchronize access to the <see cref="T:System.Net.CookieCollection" />.</value>
+        <remarks>
+          <format type="text/markdown"><![CDATA[  
+  
+## Remarks  
+ The <xref:System.Net.CookieCollection.SyncRoot%2A> property returns an object that can be used to synchronize access to the <xref:System.Net.CookieCollection>.  
+  
+ ]]></format>
+        </remarks>
       </Docs>
     </Member>
   </Members>