check strings null or empty with TryGetValue

Author: tomysshadow

FlashpointSecurePlayer/RegistryStates.cs

@@ -1592,7 +1592,7 @@ private void ModificationAdded(RegistryTraceData registryTraceData) {
             if (kcbModificationKeyNames != null) {
                 kcbModificationKeyNames.TryGetValue(safeKeyHandle, out string kcbModificationKeyName);
 
-                if (kcbModificationKeyName != null) {
+                if (!String.IsNullOrEmpty(kcbModificationKeyName)) {
                     registryStateElement.KeyName = GetRedirectedKeyValueName(
                         GetKeyValueNameFromKernelRegistryString(kcbModificationKeyName + "\\" + registryStateElement.KeyName),
                         modificationsElement.RegistryStates.BinaryType
@@ -1713,7 +1713,7 @@ private void ModificationRemoved(RegistryTraceData registryTraceData) {
             if (kcbModificationKeyNames != null) {
                 kcbModificationKeyNames.TryGetValue(safeKeyHandle, out string kcbModificationKeyName);
 
-                if (kcbModificationKeyName != null) {
+                if (!String.IsNullOrEmpty(kcbModificationKeyName)) {
                     // we have info from the handle already to get the name
                         registryStateElement.KeyName = GetRedirectedKeyValueName(
                         GetKeyValueNameFromKernelRegistryString(kcbModificationKeyName + "\\" + registryStateElement.KeyName),

FlashpointSecurePlayer/Shared.cs

@@ -1975,7 +1975,7 @@ public string this[string longPath] {
                     get {
                         pathNamesShort.TryGetValue(longPath, out string pathNameShort);
 
-                        if (pathNameShort != null) {
+                        if (!String.IsNullOrEmpty(pathNameShort)) {
                             return pathNameShort;
                         }
 
@@ -1999,7 +1999,7 @@ public string this[string shortPath] {
                     get {
                         pathNamesLong.TryGetValue(shortPath, out string pathNameLong);
 
-                        if (pathNameLong != null) {
+                        if (!String.IsNullOrEmpty(pathNameLong)) {
                             return pathNameLong;
                         }