Added more C# keywords for auto-completion

Closes #3899

PowerEditor/installer/APIs/cs.xml

@@ -3,11 +3,12 @@
 	<AutoComplete>
 		<KeyWord name="abstract" />
 		<KeyWord name="as" />
+		<KeyWord name="asyc" />
+		<KeyWord name="await" />
 		<KeyWord name="base" />
 		<KeyWord name="bool" />
 		<KeyWord name="break" />
 		<KeyWord name="byte" />
-		<KeyWord name="byte" />
 		<KeyWord name="case" />
 		<KeyWord name="catch" />
 		<KeyWord name="char" />
@@ -47,6 +48,7 @@
 		<KeyWord name="float" />
 		<KeyWord name="for" />
 		<KeyWord name="foreach" />
+		<KeyWord name="get" />
 		<KeyWord name="goto" />
 		<KeyWord name="ICollection" />
 		<KeyWord name="IComparer" />
@@ -84,7 +86,6 @@
 		<KeyWord name="new" />
 		<KeyWord name="null" />
 		<KeyWord name="object" />
-		<KeyWord name="object" />
 		<KeyWord name="operator" />
 		<KeyWord name="out" />
 		<KeyWord name="override" />
@@ -98,8 +99,8 @@
 		<KeyWord name="ref" />
 		<KeyWord name="return" />
 		<KeyWord name="sbyte" />
-		<KeyWord name="sbyte" />
 		<KeyWord name="sealed" />
+		<KeyWord name="set" />
 		<KeyWord name="short" />
 		<KeyWord name="sizeof" />
 		<KeyWord name="SortedDictionary" />
@@ -224,6 +225,7 @@
 		<KeyWord name="unsafe" />
 		<KeyWord name="ushort" />
 		<KeyWord name="using" />
+		<KeyWord name="using static" />
 		<KeyWord name="var" />
 		<KeyWord name="virtual" />
 		<KeyWord name="void" />