initial error message

Author: Anam Navied

src/code/UninstallPSResource.cs

@@ -259,6 +259,17 @@ private bool UninstallPkgHelper(out List<ErrorRecord> errRecords)
                 }
             }
 
+            // If we found package to uninstall by name, but not satisfied by version criteria (i.e version didn't exist or match prerelease criteria) write error
+            if (currentUninstalledDirCount == 0)
+            {
+                string prereleaseMessage = Prerelease ? "prerelease " : String.Empty;
+                string versionMessage = Version != null ? "matching '{Version} '" : String.Empty;
+
+                string warningMessage = $"Cannot uninstall {prereleaseMessage}version(s) '{versionMessage}'of resource '{String.Join(", ", Name)}' because it does not exist.";
+
+                WriteWarning(warningMessage);
+            }
+
             return successfullyUninstalled;
         }