adding missing language identifier

docs/csharp/language-reference/preprocessor-directives/preprocessor-elif.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #elif (C# Reference)
 `#elif` lets you create a compound conditional directive. The `#elif` expression will be evaluated if neither the preceding [#if](../../../csharp/language-reference/preprocessor-directives/preprocessor-if.md) nor any preceding, optional, `#elif` directive expressions evaluate to `true`. If a `#elif` expression evaluates to `true`, the compiler evaluates all the code between the `#elif` and the next conditional directive. For example:  
 
-```  
+```csharp
 #define VC7  
 //...  
 #if debug  
@@ -48,7 +48,7 @@ translation.priority.ht:
 ## Remarks  
  `#elif` is equivalent to using:  
 
-```  
+```csharp
 #else  
 #if  
 ```  
@@ -60,4 +60,4 @@ translation.priority.ht:
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-endif.md

@@ -33,8 +33,8 @@ translation.priority.ht:
 # #endif (C# Reference)
 `#endif` specifies the end of a conditional directive, which began with the [#if](../../../csharp/language-reference/preprocessor-directives/preprocessor-if.md) directive. For example,  
 
-```  
-      #define DEBUG  
+```csharp
+#define DEBUG  
 // ...  
 #if DEBUG  
     Console.WriteLine("Debug version");  

docs/csharp/language-reference/preprocessor-directives/preprocessor-endregion.md

@@ -33,8 +33,8 @@ translation.priority.ht:
 # #endregion (C# Reference)
 `#endregion` marks the end of a [#region](../../../csharp/language-reference/preprocessor-directives/preprocessor-region.md) block. For example:  
 
-```  
-      #region MyClass definition  
+```csharp
+#region MyClass definition  
 class MyClass   
 {  
     static void Main()   

docs/csharp/language-reference/preprocessor-directives/preprocessor-error.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #error (C# Reference)
 `#error` lets you generate an error from a specific location in your code. For example:  
 
-```  
+```csharp
 #error Deprecated code in this method.  
 ```  
 
@@ -44,7 +44,7 @@ translation.priority.ht:
 
 ## Example  
 
-```  
+```csharp
 // preprocessor_error.cs  
 // CS1029 expected  
 #define DEBUG  
@@ -62,4 +62,4 @@ class MainClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-if.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #if (C# Reference)
 When the C# compiler encounters an `#if` directive, followed eventually by an [#endif](../../../csharp/language-reference/preprocessor-directives/preprocessor-endif.md) directive, it will compile the code between the directives only if the specified symbol is defined.  Unlike C and C++, you cannot assign a numeric value to a symbol; the #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example,  
 
-```  
+```csharp
 #define DEBUG  
 // ...  
 #if DEBUG  
@@ -58,7 +58,7 @@ When the C# compiler encounters an `#if` directive, followed eventually by an [#
 
 ## Example  
 
-```  
+```csharp
 // preprocessor_if.cs  
 #define DEBUG#define MYTEST  
 using System;  
@@ -83,4 +83,4 @@ public class MyClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-line.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #line (C# Reference)
 `#line` lets you modify the compiler's line number and (optionally) the file name output for errors and warnings. This example shows how to report two warnings associated with line numbers. The `#line 200` directive forces the line number to be 200 (although the default is #7) and until the next #line directive, the filename will be reported as "Special". The #line default directive returns the line numbering to its default numbering, which counts the lines that were renumbered by the previous directive.  
 
-```  
+```csharp
 class MainClass  
 {  
     static void Main()  
@@ -65,7 +65,7 @@ class MainClass
 ## Example 1  
  The following example shows how the debugger ignores the hidden lines in the code. When you run the example, it will display three lines of text. However, when you set a break point, as shown in the example, and hit F10 to step through the code, you will notice that the debugger ignores the hidden line. Notice also that even if you set a break point at the hidden line, the debugger will still ignore it.  
 
-```  
+```csharp
 // preprocessor_linehidden.cs  
 using System;  
 class MainClass   
@@ -84,4 +84,4 @@ class MainClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-pragma-checksum.md

@@ -35,7 +35,7 @@ Generates checksums for source files to aid with debugging [!INCLUDE[vstecasp](~
 
 ## Syntax  
 
-```  
+```csharp
 #pragma checksum "filename" "{guid}" "checksum bytes"  
 ```  
 
@@ -60,7 +60,7 @@ Generates checksums for source files to aid with debugging [!INCLUDE[vstecasp](~
 
 ## Example  
 
-```  
+```csharp
 class TestClass  
 {  
     static int Main()  
@@ -73,4 +73,4 @@ class TestClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-pragma-warning.md

@@ -36,7 +36,7 @@ translation.priority.mt:
 
 ## Syntax  
 
-```  
+```csharp
 #pragma warning disable warning-list  
 #pragma warning restore warning-list  
 ```  
@@ -52,7 +52,7 @@ translation.priority.mt:
 
 ## Example  
 
-```  
+```csharp
 // pragma_warning.cs  
 using System;  
 
@@ -80,4 +80,4 @@ public class D
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
  [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)   
- [C# Compiler Errors](../../../csharp/language-reference/compiler-messages/index.md)
+ [C# Compiler Errors](../../../csharp/language-reference/compiler-messages/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-pragma.md

@@ -39,7 +39,7 @@ translation.priority.ht:
 
 ## Syntax  
 
-```  
+```csharp
 #pragma pragma-name pragma-arguments  
 ```  
 
@@ -55,4 +55,4 @@ translation.priority.ht:
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
  [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)   
  [#pragma warning](../../../csharp/language-reference/preprocessor-directives/preprocessor-pragma-warning.md)   
- [#pragma checksum](../../../csharp/language-reference/preprocessor-directives/preprocessor-pragma-checksum.md)
+ [#pragma checksum](../../../csharp/language-reference/preprocessor-directives/preprocessor-pragma-checksum.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-region.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #region (C# Reference)
 `#region` lets you specify a block of code that you can expand or collapse when using the [outlining](https://docs.microsoft.com/visualstudio/ide/outlining) feature of the Visual Studio Code Editor. In longer code files, it is convenient to be able to collapse or hide one or more regions so that you can focus on the part of the file that you are currently working on. The following example shows how to define a region:  
 
-```  
+```csharp
 #region MyClass definition  
 public class MyClass   
 {  

docs/csharp/language-reference/preprocessor-directives/preprocessor-undef.md

@@ -37,7 +37,7 @@ translation.priority.ht:
 
 ## Example  
 
-```  
+```csharp
 // preprocessor_undef.cs  
 // compile with: /d:DEBUG  
 #undef DEBUG  
@@ -59,4 +59,4 @@ class MyClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)

docs/csharp/language-reference/preprocessor-directives/preprocessor-warning.md

@@ -33,7 +33,7 @@ translation.priority.ht:
 # #warning (C# Reference)
 `#warning` lets you generate a level one warning from a specific location in your code. For example:  
 
-```  
+```csharp
 #warning Deprecated code in this method.  
 ```  
 
@@ -42,7 +42,7 @@ translation.priority.ht:
 
 ## Example  
 
-```  
+```csharp
 // preprocessor_warning.cs  
 // CS1030 expected  
 #define DEBUG  
@@ -60,4 +60,4 @@ class MainClass
 ## See Also  
  [C# Reference](../../../csharp/language-reference/index.md)   
  [C# Programming Guide](../../../csharp/programming-guide/index.md)   
- [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)
+ [C# Preprocessor Directives](../../../csharp/language-reference/preprocessor-directives/index.md)