Workaround for NuGet restore bug

Author: tmat

Directory.Build.props

@@ -25,6 +25,9 @@
     <OSName Condition="'$(OSName)' == '' AND $(PortableTargetRid) != ''">$(PortableTargetRid.Substring(0, $(PortableTargetRid.LastIndexOf('-'))))</OSName>
     <OSName Condition="'$(OSName)' == '' AND $(TargetRid) != ''">$(TargetRid.Substring(0, $(TargetRid.LastIndexOf('-'))))</OSName>
     <OSName Condition="'$(OSName)' == ''">$(HostOSName)</OSName>
+
+    <!-- Workaround for https://github.com/NuGet/Home/issues/14745 -->
+    <SDKAnalysisLevel>10.0.200</SDKAnalysisLevel>
   </PropertyGroup>
 
   <PropertyGroup>

src/System.CommandLine.StaticCompletions/DynamicSymbolExtensions.cs

@@ -6,8 +6,6 @@ namespace System.CommandLine.StaticCompletions;
 /// </summary>
 public static class DynamicSymbolExtensions
 {
-    private static readonly Lock s_guard = new();
-
     /// <summary>
     /// The state that is used to track which symbols are dynamic.
     /// </summary>
@@ -20,44 +18,38 @@ public static class DynamicSymbolExtensions
         /// </summary>
         public bool IsDynamic
         {
-            get
-            {
-                lock (s_guard)
-                {
-                    return s_dynamicSymbols.GetValueOrDefault(option, false);
-                }
-            }
-            set
-            {
-                lock (s_guard)
-                {
-                    s_dynamicSymbols[option] = value;
-                }
-            }
+            get => s_dynamicSymbols.GetValueOrDefault(option, false);
+            set => s_dynamicSymbols[option] = value;
+        }
+
+        /// <summary>
+        /// Mark this option as requiring dynamic completions.
+        /// </summary>
+        /// <returns></returns>
+        public Option RequiresDynamicCompletion()
+        {
+            option.IsDynamic = true;
+            return option;
         }
     }
 
     extension(Argument argument)
     {
-        /// <summary>
         /// Indicates whether this argument requires a dynamic call into the dotnet process to compute completions.
-        /// </summary>
         public bool IsDynamic
         {
-            get
-            {
-                lock (s_guard)
-                {
-                    return s_dynamicSymbols.GetValueOrDefault(argument, false);
-                }
-            }
-            set
-            {
-                lock (s_guard)
-                {
-                    s_dynamicSymbols[argument] = value;
-                }
-            }
+            get => s_dynamicSymbols.GetValueOrDefault(argument, false);
+            set => s_dynamicSymbols[argument] = value;
+        }
+
+        /// <summary>
+        /// Mark this argument as requiring dynamic completions.
+        /// </summary>
+        /// <returns></returns>
+        public Argument RequiresDynamicCompletion()
+        {
+            argument.IsDynamic = true;
+            return argument;
         }
     }
 }