Do not write the fixed keyword multiple times for nested array types.

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -127,9 +127,11 @@ namespace CppSharp.Generators.CSharp
                         Type = string.Format("{0}*", array.Type.Visit(this, quals))
                     };
                 }
+                // Do not write the fixed keyword multiple times for nested array types
+                var fixedKeyword = array.Type is ArrayType ? string.Empty : "fixed ";
                 return new CSharpTypePrinterResult()
                 {
-                    Type = string.Format("fixed {0}", array.Type.Visit(this, quals)),
+                    Type = string.Format("{0}{1}", fixedKeyword, array.Type.Visit(this, quals)),
                     NameSuffix = string.Format("[{0}]", array.Size)
                 };
             }

tests/Basic/Basic.h

@@ -17,6 +17,8 @@ public:
 	const char* GetANSI();
 	// TODO: VC++ does not support char16
 	// char16 chr16;
+
+	float nested_array[2][2];
 };
 
 struct DLL_API Bar